Summaries for card indexes

Summaries for card indexes

SUMMARIES FOR CARD INDEXES Kinetochromic spectrophotometry-I. Determination of fluoride by catalysis of the zirconium-Xylenol Orange reaction: MAR...

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SUMMARIES

FOR

CARD

INDEXES

Kinetochromic spectrophotometry-I. Determination of fluoride by catalysis of the zirconium-Xylenol Orange reaction: MARIA LUISA CABELLO-TOMASand T. S. WEST, Tuhntu, 1969, 16, 781. (Chemistry Department, Imperial College, London, S.W.7.) Summary-The reaction between slightly aged solutions of zirconyl chloride and Xylenol Orange is catalysed by the presence of substoichiometric amounts of fluoride, phosphate, arsenate, sulphate, citrate or oxalate. The reaction provides a method for determining fluoride in amounts from 0.5 to 5 pg in a final volume of 100 ml. This kinetochromic reaction provides an effective molar absorptivity of 2.0 x 106 for the fluoride ion. The colour reaches maximal development within 90min and remains stable thereafter for 60 min, when measured against a reaction system blank containing no fluoride. Because of its substoichiometric nature the reaction may not be used for the determination of large amounts of fluoride.

Kinetochromic spectrophotometry-II. Determination of sulphate by catalysis of the zirconium-Methylthymol Blue reaction: R. V. HEMS, G. F. KIRKBRIGHTand T. S. WEST, Tahtu, 1969,16,789. (Chemistry Department, Imperial College, London, S.W.7.) Summary_--A direct spectrophotometric method is proposed for the determination of sulphate, based on its ability to catalyse the slow reaction between Methylthymol Blue and zirconium in slightly aged solution. The procedure is operated in the same way as a normal spectrophotometric method but with stricter control of timing. The interference of lOO-fold excesses of 40 other ions was studied. Of these, Ce(III), Sr, Fe(III), Th, Sn(II), U(V), Mn(II), Sb(III), Se(IV), Bi(III), Te(IV), SOaa-, F-, PO,+, AsOIS-, S2-, tartrate, oxalate and citrate interfered. Cationic interferences may be removed by cation-exchange. The interference of equimolar ratios of arsenate, fluoride and phosphate may be removed by preliminary treatment with magnesium oxide. Stdphate may be deieimined in ihe range 0.1-2.4 ppmby the recommended procedure with a net molar absorptivity of 2.0 x lo4 at 586 nm. The colour development time is 60-min.

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Summaries for card indexes

The microwave-excited emissive detector in gas-phase chromatographyI. Some studies with sulphur compounds: R. M. DAGNALL, S. J. PRATT, T. S. WEST, 7”Zunta, 1969, 16, 797. (Chemistry Department, Imperial College, London, S.W.7) and D. R. DEANS(H.O.C. Division I.C.I. Ltd., Billingham Co. Durham). Summary-An examination is made of the characteristics of a microwave-excited emissive detectoranditspotentialuse in thegaschromatography of sulphur compounds. The column was opzrated slightiy above atmosoheric nressure (cu. 105 kN/ma) and the microwave detector at a’conven:ent reduced pressure’@;., 13-40 mbar). It is concluded that the most sensitive and specific wavelengths for analytical purposes are not necessarily the same for all the sulphur compounds examined, viz. carbon disulphide, thiophen, thioglycollic acid, dimethylsulphoxide and sulphur dioxide. The spectra obtained for each compound with argon or helium as carrier gas were characterized and only the atomic lines due to sulphur at 190.0 and 191.5 nm, the C==S system with a bandhead around 2576 nm and the C, bandhead at 516 nm were shown to be common to the organic compounds (except CS for thioglvcollic acid). Carbon disulphide was the most easily fraa mented %d gave a limit of detection-of @2 ng of sulphur at 257.6 n% even with the low luminosity monochromator used. Thioglycollic acid was the least easily fragmented compound.

Determination of trace amounts of organic asids in silage by liquid chromatography: G. W. GOODMAN,B. C. LEWIS and A. F. TAYLOR, Tulualu, 1969, 16, 807. (BP Chemicals, Research and Development Department, Epsom Division, Great Burgh, Epsom, Surrey, U.K.) Summa~--Trace amounts of organic acids in silage may be determined rapidly and quantitatively by ion-exclusion chromatography. The method described uses a conductimetric microcell to monitor the aqueous eluate from the column. Examination of the results obtained shows that the method has a coefficient of variation of 6% when the sample is injected onto a column with the solvent running. It appears likely that the technique could be applied to mixtures of other acids.

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DAGNALL, S.J.PRATT,T.S. WEST and D. R. DEANS,Talunta, 1969,16,797.

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TAYLOR,

Tufanta, 1969,16,807.

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Summaries for card indexes

Reversed phase partition chromatographic separations with 2-ethylhexyl dihydrogen phosphate and di-2-ethylbydrogen phosphate: S. J. LYLE and V. C. NAIR, Tdunta 16, 1969, 813. (The Chemical Laboratory, The University of Kent at Canterbury, Kent, England.) Summary-Di-2-ethylhexyl hydrogen phosphate (HDEHP) and 2ethylhexyl dihydrogen phosphate (H*MEHP) are compared as stationary phases in reversed-phase chromatography of selected lanthanides, strontium, yttrium, barium, manganese(R), iron(IIl), cobalt(II), nickel, gold(III), platinum(N), palladium(I1) and silver. Chromatograms were mainly developed with hydrochloric acid at various concentrations. In general H,MEHP was found to be less satisfactory than HDEHP. Development of chromatograms by dilute aqueous electrolytes on paper is slower and separations of chemically similar metals such as lanthanides is not encouraging. However, movement of lanthanides by EDTA at pH 3 in an aqueous sodium perchlorate medium occurs only on H,MEHP-treated paper. Good separations of iron(lI1) and cobalt(I1) are possible on paper treated with either ester, and gold(II1) and platinum(N) are separated on HDEHP-impregnated paper. Column methods for the separation of carrier-free gold-199 and iron-59 from macro-amounts of neutronirradiated platinum and cobalt, respectively, have been developed.

Isotope dilution analysis in the micro and submicro range by doublelabelling and precipitation on paper: H. WEISZand V. KRIV~~N,T’lunru, 1969, 16, 823. (Chemical Laboratory of the University of Freiburg i. Br., German Federal Republic.) Summary-A new variation of isotope dilution analysis based on double labelling carried out on filter paper is described. The determination of microgram and submicrogram amounts of silver (labelled with 11omAg) by precipitation with iodide (labelled with 1311)and of calcium (labelled with %Za) by precipitation with phosphate (labelled with s8P) are given as examples. In the first example the two radioelements (“OrnAg and 1311) are measured by y-spectrometry, in the second one (““Ca and 3*P) by a /I-absorption method. A number of results show the usefulness of the method.

24

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16, 1969, 813.

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Tuhtu,

1969, 16, 823.

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Summaries for card indexes

Some developments in the chemical direct oxygen determination: P. GOUVERNEUR and A. C. BRUIJN, Tulanta, 1969, 16, 827. (Koninklijkel Shell-Laboratorium, Amsterdam.) Summary-This paper discusses modifi~tions of the direct determination of oxygen in organic compounds by reduction with carbon. Two versions are considered, (a) a microscale method for compounds containing metals, phosphorus or boron, and including automatic non-aqueous carbon dioxide titration, and (b) a manometric method capable of analysing samples containing traces of oxygen down to 5 PPm.

A specific gas cluomatographic detector for carbonyl compounds, based on poIar~phy: B. FLEET and T. H. RISBY, ~a~u~fu, 1969, 16, 839. (Department of Chemistry, Imperial CoIIege of Science, London S.W.7.) Summary-The evaluation of a specific gas chromatographic detector for carbonyl compounds is described. This is based on the polarographic reduction of the Girard T hydrazone derivative which is formed when the carbonyf compound is absorbed in a buffered supporting el~trolyte containing the carbonyl reagent. The detector was used to monitor the separation of a homologous series of alkanals.

Solvent extraction-absorptiometric determination of niobium in steels with Bromopyrogallol Red: T. V. RAMAKRISHNA,S. A. RAHIM and T. S. WEST, Tulanlu, 1969,16, 847. (Chemistry Department, Imperial College, London, S.W.7, U.K.) Summa~--A simple and rapid method is described for the determination of niobium in steel with Bromopyrogallol Red. After dissolution of the sample, niobium is extracted along with iron from concentrated hydrochloric acid into isopentyl acetate. Niobium and iron are stripped into an aqueous solution containing sodium acetate, and EDTA, ammonium chloride, tartaric acid, and Bromopyrogallol Red are added to complex the niobium. The niobium-Bromopyrogalloi Red complex along with excess of reagent is extracted into isopentyl acetate containing di-n~tyimethyl~ine, and measured at 610nm. The moIar absorptivity is 2.50 x fO* and Beer’s law is obeyed up to 27 ,ug of niobium. The method is free from interferences and can be applied to the analysis of samples containing as little as 0.01% niobium.

vii

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HEICOTOPbIE YCl-IEXEl B IIPFIMOM XBMWIECICOM OrIPEjJEJIEHBB ICLICJIOPOJJA: P. GOUVERNEUR

and A. C. BRUIM, Talanta, 1969,16,827.

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T. V. RAMAKRISHNA,

C

S. A. RAHIM~~~T. S. WEST,Takznta, 1969,16,

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Summaries for card indexes

Electrochemical oxidation-reduction paths for pyrimidlne, cytosine, purine and adenine. Correlation and application: GLENN DRYHURST and PHILIP J. ELVING, Tulanfa, 1969, 16, 855. (University of Oklahoma, Norman, Oklahoma, U.S.A.) Summary-In order to evaluate the striking discrepancy between the experimental ease of polarographic reduction of adenine and cytosine, and that predicted by molecular orbital calculation, the electrochemical oxidation-reduction behaviour of pyrimidine, cytosine, purine, adenine and related compounds was investigated at both mercury and graphite electrodes. Information was obtained on the specific adsorption of reactant and product species on the electrode, the reversibility of the energy-controlling electron-transfer step, and accompanying chemical reactions. Triangular sweep voltammetry, a.c. and d.c. polarography, and electrocapillary data, in particular, were utilized. The first three techniques were critically examined for their potential analytical utility. The results were compared with previously obtained electrochemical data and the sequence of electron-transfer and various nonelectron transfer steps was more firmly established. It became clear that in order validly to correlate quantum mechanically calculated data for the energy required to add or remove an electron to or from the outermost electron level of each molecule (in the gas phase), with electrochemical redox potentials (in solution), the effects of adsorption electron-transfer reversibility and solvation energy must be considered.

Determination of carbon monoxide in metal carbcmyl complexes: A. D. CAMPBELLand P. E. NELSON, Talantu, 1969, 16, 875. (University of Otago, Dunedin, New Zealand.) Summa~-Carbon monoxide is liberated from carbonyl-containing metal complexes by treatment with various reagents such as pyridinium hydrobromide perbromide in dichloromethane, hydrogen peroxide in acetone, or iodine in pyridine, and oxidized to carbon dioxide by the Schiitze iodine pentoxide reagent. The carbon dioxide is determined gravimetrically following absorption on soda asbestos.

ix

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DRYHURST

and PHILIPJ. ELVINO, Tulunfu,1969, 16, 855.

b%IOiW-C ~WIbIO HCIIbITaTb 09eBHAHyIO pa3HHgy MemAy 3KCIIepIfMeHTaJIbHOfi JIerKOCTbIOIIOJI~pOrpa~~~eCKO~O BOCCTBHOBJIeHHR aAeHIlHa II gEIT03EIHaII IIOBeAeHHeM UpeACKa3aHHbIM Ha OCHOBe paCWieTa MOJIeKyJIFIpHbIX Op6IlT MByqeHbI 3JleKTpOXW MEl'IeCKEleOKIICJlEITeJlbHO-BOCCTaHOBIlTeJlbHMe XapaKTepllCTMKEl llHp~M%¶AHIia,gHTOk%fHa, IlypHHa, WeHtIHa Ii CpOAHbIX COeA&iHeHI& Ha pTyTHOM EI rpa@IiTOBOM NIeKTpOAaX. nonyseHbI AaHHbIe o cnegm@mecKot aAcop6gm peaKTaHTa M nponyKTa Ha aneKTpoge, 0 peBepcHpyeMocT&i KOHTpOJIJIHpyIOIlJeii aaepram CTaAtrHIIepeHocaaJIeKTpoHa,IIo COIIpOBOHQaIOIgHXXllMWieCKLlX peaKgmx. HpllMeHeHbI MeTOAbI TpeyrOJlbHOa OCgI¶JlJIOrpa@HseCKOfi IIOJIHpOrpa@iH, IIepeMeHHOTOqHO8 II IIOCTOFIHHOT09HOfi nomporpa$Wi, a OcO6eHHo aneKTpoKanHnnRpHbIe AaHHbIe. ICpHTElreCKIlo6cyHcAeHanpHMeHnMOCTbaTElXMeTOAOBBaHa31Hae. Pe3yJIbTaTbI CpaBHeHbI C IlOJIyYeHHblMH paHee WIeKTpOXITMIP 4eCKIIMH AaHHbIMU H 6onee llOp=iHOyCTaHOBneH IIOpRAOK CTaAMtt nepeHoca aneKTpoHa EI HeaneKTpomoro nepenoca. OKaaanocb HYIKH~IM WHTaTb BJIHFiHEIeaAcop6gm, peBepCHpyeMOCTH nepeHOCa NIeKTpOHa II aHeprm COJIbBaTagHH ecmi )fCenaeTcfl npaBMJIHO IIpHBeCTLlB COOTHOIIIeHHe CqHTaHHbIeHa OCHOBe KBaHTOBOa MeXaHHKEi AaHHbIe 0 BHeprIlllHyHCHOi AJlF1IlpMCOeAElHeHIlRIfJILl y~aJleHWl OAHOrO 3JleKTpOHa CaMOMy OTAaJleHHOMy eJleKTpOHHOMy ypOBHH) KaHQOti MOJIeKyJIbl(B rai3OBOfi@aae) C 'NIeKTpOXHMWieCKHMI4 OKEICJlHTeJlbHO-BOCCTaHOBElTenbHbIMH XlOTeHglNJlaMLl(B paCTnOpe).

Ol-IPE~EJIEHBE OKElCI4 YI’JIEPOAA B KAPEOHBJIKOMIIJIEKCAX METAJIJIOB: A. D. CAMPBELL and P. E. NELSON,Tuluntu, 1969, 16, 875. Pe3IOMe---OKHCb yrnepoAa BbIAeJfRIoTEl8Kap60HmCOAepma~EX KoMn~eKcoBMeTamoBpearmpoBaH~eM cpaaHb~M~peareHTanm-tInpIQkIHHti6pOMHA-IIep6pOMIiAoM B paCTBOpe AHXJIOpMeTaHa, IIepeKIWbIO BOAOpOAa B ageTOHe UJIH paCTBOpOM ElOAa B IIElpHpIEiHf?-I.5 OKHCJIRIOT B AByOKHC yrJIepOAa IIFfTHOKHCbH) HOAa (peareHToM Ikoge). JJByoKmb ymepona 0npeAenmoT rpasw MeTpMYeCKmM IlyTeM IlOCJle a6op6npoBaKm Ha HaTpMeBOM ac6ecTe.

Summaries for card indexes

Direct determination of oxygen in organic materials-I. A study of the carbon reduction method: G. INGRAMand J. R. MAJER, Talanra 1969, 16, 881. (Chemistry Department, University of Birmingham, P,O; Box 363, Birmingham 15, England.) Sammary-The results of an investigation into the nature of the carbon reduction process in the Unterzaucher method for the microdetermination of oxygen are reported and discussed. The reaction between carbon dioxide and carbon is discussed, and its relation to the specific surface area, which contrary to belief has been found not to contribute to the efficiency of the reaction. It is shown that carbon-oxygen complexes give rise to errors in the results, and that an intermediate, SiO(OH), formed on the inner surface of the silica pyrolysis tube might be a precursor to the formation of carbon monoxide as a source of blank error and of the apparent oxygen content of pure hydrocarbons.

Adsorption and displacement effects in the gas chromatography of metal B-diketonates: P. C. UDEN and C. R. JENKINS,Talanta, 1969, 16, 893. (Department of Chemistry, The University of Birmingham, P.O. Box 363, Birmingham, 15, England.) Summary_-A detailed study of the gas chromatography of the aluminium(TITl. chromium(B1) and iron(lTI) B-diketonates has shown that their elution and separation char&t&tics arise from a number of adsorptive effects. Conditions of optimal peak shape for individual compounds are established by varying chromatographic parameters, and the adsorntion of one metal chelate on a column and its subseuuent displacement by another chelate are investigated. The chromatography of iron(III) B-diketonates is seen to be further complicated by gradual elution of a portion of the chelate before the rest of the sample.

Interfacial systems for the coupling of gas chromatography with mass spectrometry: D. 1. REES, Talanta, 1969, 16, 903. (Lyons Central Laboratories, 149 Hammersmith Rd., London W.14.) Summary-This review is an account of the various interfacial systems used in the mass spectrometdc analysis of gas chromatographic eluates.

Xi

Xii

AHHOTaqIiH

CTaT@fi

IIPFIMOE OIIPEflEnEHkIE KI?CJIOPO~A B OPI’AHM9ECKBX BEIQECTBAX:-I. I43YYEHBE METOAA BOCCTAHOBJIEHIGI C YI’JIEPOAOM: R.

BELCHER, G. INGRAMand J. R. MAJER,Tuluntu, 1969,16, 881. 14 o6cyxcneKa pe3ynbTaTbI EIccne~oBaHm lTpHpO&bI IIpOueCCa BOCCTaHOBJIeHLIfl yrJIepOAOM B MeTOne YHTepqayxepa AJIRMnKpoonpe~eneHm micnepo~a. 06cy?KReBa peaKwm AB~OKMCM yrnepona c yrnepoAoM ee omomeme K Pe3IOM%-cOO6~eHbI

yaeJlbHOi IIOBepXHOCTm, KOTOpaFI, IIpOTIlBHO 06bIKHoBeHHbIM MHeHEIRM, He BJIIlfleTHa E3@$eKTHBHOCTb peaKqlUL ~OKaBaHO UT0 KOMIIJIeKCbI yrJIepOAa II KKCJIepOAa BbIWBaIOT OIU116KM B peayJIbTaT'&X M 4TO IIpOMeZ(yTO=IHOe COeAllHeHEle SiO(OH) o6paaymueem Ha BHyTpeHHOti CTeHKe KBapQeBOt ~py6KK AJIll mponaaa Mar 61~ 6bITb npegTesa o6pa3Baamo OKHC~ yrnepoAa KBKMCTO=IHHKaOlIIH609HbIX~TaJlOHOBH KamylIJerO llpllCyTCTBHf~ KHCJIepOAa B =IllCTbIXylVTeBO~OpO~aX.

3iDQEICTbI AACOPBqIZB EI 3AMEwEHWl B kl3YYEHLIl4 /?-ABKETOHATOB METAJIJIOB METOAOM I’A30BOm XPOMATOI’PAQl4B: P. C. UDENand C. R. JENKINS,Tduntu, 1969,16, 893. Pe3IOMe--nOApO6HOe

Hsy=leHEIe b-AEIKeTOHaTOB

aJIH)MHHIIH(III),

xpoMa(II1) m meneaa(II1) MeToAoMrasoaoa xpoMaTorpa@iK IIOKa3aJIO BnElFIHMepFfAa a@ZOp6QHOHHbIX B@@eKTOB Ha EIX XapaKTepmmKn anmposam~ EI pa3AeneBmi. OnpeAeneKbI yCnOB~l~AnXnOnyseHElsOnTLlManbHOi #OPMbl IIHKOBOTA~JI~H~IX coeAEHemti HaMeKemeM xpoMaTorpa@mecKnx napaMeTpoB EI KccnegoBaHa aAcop6qm xejIaTa MeTama Ha KonoHKe II ero XpoMaTorpa@m nocneAymmee 8aMeueavre Apyrm xenaToM. /%_AHKeTOHaTOB HteZe3a(III) yCJIO?KHeHa IIOCTeIIeHHbIM WlIOLlpOBaHB?M=IaCTHXeJlaTanepeA OCTaJlbHOi npo6b1.

ME?fCIIOBEPXHOCTHbIE CklCTEMbI COITPSI?KEHMFI I’A30BOI’O XPOMATOI’PAQA C MACC-CIIEKTPOMETPOM:

D. I. REES,Tuhtu,

1969,16,903.

Pe3IOM4+-flpl¶BeJIeH odaop pa3HbIX CliCTeM COIIpH%eHIlFI HCIIOJIbBOBaHHbIX B MaCC-CIleKTpOMeTpEi~eCKOM aIEUIH3e WIIOaTOB IIOJIy=IeHHbIX MeTOAOM ra3OBOiXpOMaTOrpa@Gi.

...

Xl11

Summaries for card indexes

Polarographic determination of alumfnium with alizarin: D. W. SELBY, Talanta, 1969, 16, 915.

M.

hPEL

and

Summary-The polarographic determination of aluminium as its complex with alizarin in the pH range 9.2-10.1, with the cathode ray polarograph, is described. A solvent extraction procedure is used to eliminate interferences from many other metals.

Kinetische Bestimmung von MolybGtn unter Verwendung eines Potentiostaten: H. WEISZ,D. KLOCKOW and H. LIJD~IO, Tahta, 1969,16,921. (Chemisches Laboratorium der Universitiit Freiburg i. Br., Lehrstuhl ftir Analytische Chemie, Bundesrepublik Deutschland.) Summary-A kinetic method is described for the determination of molybdenum by its catalytic effect on the peroxide-iodide reaction. The reaction rate is kept constant by adding iodide at the same rate as it is being consumed, the concentration being kept constant by a potentiostat. The rate of the addition of iodide is then proportional to the molybdenum concentration. The element was determined in the range @5-l 1 ,ug in 50 ml.

Applications of enzyme-catalysed reactions in trace analysis-IV. Determination of beryllium and zinc by their inhibition of calf-intestinal alkaline phosphatase: A. TOWN~I-IENLI and A. VAUGHAN, Talanta, 1969, 16, 929. (Chemistry Department, The University, P.O. Box 363, Birmingham 15, England.) Summary-Methods are described for the determination of beryllium (18-90 ng) and zinc (0.6-6 ,ug). based on their inhibition of calfintestinal alkaline phosphatase.

xiv

rIOJIfiPOI’PA@B=IECKOE OI-IPEaEJIEHtIE AJIIOMBHBR AJIB3APBHOM: M. KAPEL and D. W. SELBY, Tulunta, 1969,16,915. Pe3IOMe--OIIHCaHOIIoJIRporpaI$WIecKoeoIIpe~eiIeHEle anbxfnEIKHsx B @OpMe ero KOMnJIeKca c ankI3apkiHoM B npenenax pH 9,2-lo,1 c MCnoJIb30BaHIIeM OC~SWIO~OJIHpOrpa@a. BnnKxe MHO~OgllCJIeHHbIXApyrllX MeTaJIJIOBHCKJIIOYBHO IIpHMeHeHHeM ZlaBJIeseHElFIpaCTBOpHTeJIeM.

KBHETIFIECKOE OIIPEAEJIEHBE MOJIkIEJJEHA BCIIOJIb30BAHBEM IIOTEHIJBOCTATA: H. WEISZ, D. KLOCKOW

C

and H. LUDWIG, Z’alunra, 1969,16,921.

Pesww-OnncaK KnKenisecKnZf MeTon 0npeAeneKn MoJItrbAeHa Ha 0cKoBe ero KaTaJItiTxviecKoroa$QeKTa Ha peaKqtfm nepeKkux C HO@lAOM. CKOpOCTb peaKlJl5I.i IIOJ&AepHS¶BaeTCH IIOCTOFlHHOfk ;Ro6asnenHeM paCTBOpy IlOAtlAaTOti me CKOpOCTbH) KOTOpOP OH paCXOAyeTCX,CllCllOJIb3OBaHEleM IIOTeH~HOCTaTa~JlFI lIOAAep%ttllBaHHR KORqeHTpaqHEl l¶OAHAa. CKOpOCTb UpIIAaWi HOAMAa IIpOIlOp~MOHaJIbHaR KOHqeHTpWEIII Monn6AeHa. %'ieMeHT OnpeAeJreH B 06nacTH O&11 MKr B 50 MJI.

IIPmMEHEHME ICATAJIM3MPOBAHHbIX EH3BMAMtI PEAICuElfl B CJIEAOBOM AHAJIM3E-IV. OIIPEAEJIEHIJE BEPHJIJ-NGI M IJklHECA HA OCHOBE HX ~HI’BBBPOBAHBfI IIJEJIOYHOB QOCQATA3bI tI3 KIJIIIICM TEJIRT: A. TOWNSHEND

and A. VAUGHAN,

Talanta, 1969, 16,929.

Pesrom~OnmcaKbI MeTogbI onpenenewiff Bepnnnns (18-90 Kr) H qHHKa (0,6-6 MKr), OCHOBaHHbIe Ha HX nHr&t6SipOBaHaE m(eJIO4HOB @oc@aTa3bIM3 KEiIJlKEITeJIJxT.

Summaries for card indexes

A comparison of some pyridyl-substituted pyrazines as analytical reagents: W. I. STEPHEN, Tulanru, 1969, 16, 939. (Department of Chemistry, The University, P.O. Box 363, Birmingham 15, U.K.) Summa~--A comparative study of six 2-pyridyl and 2-(6-methylpyridyl) derivatives of pyrazine as chromogenic reagents of the ferroin and cuproin types has established 2,3,5,6_tetrakis(2’-pyridyl)pyrazine as a highly sensitive reagent for iron@); 2,3-bis(2’-pyridyl)-5,6dihydropyrazine and 2,3-bis[2’-(6’-methylpyridyl)]-5,6-dihydropyazine both show high sensitivity and characteristic high selectivity in their reactions with iron and copper(I) respectively--the reaction with copper(I) being almost as sensitive as that given by bathocuproine. The ease with which the highly coloured metal chelates can be extracted into immiscible solvents to give stable solutions makes these reagents useful for the determination of traces of iron and copper.

Analytical applications of co-ordination compormds: J. N. BRAZIER, Tnlanfa, 1969, 16, 949. (The Mersey White Lead Co. Ltd., Sankey Bridges, Warrington, England.) Summary-The uses of metal complex compounds in the various fields of analytical chemistry are reviewed with particular reference to newer reagents and fresh applications of established reagents. The topics covered include precipitants, volumetric reagents, indicators and solvent extraction-reagents. A new method for-the &&metric detetmination of gold with rrans-dichlorobis(ethylenediamine)cobalt(III) chloride is included.

Structure-activity relationships of some S-nitro-2-fwaldehyde oximes and hydrazones: G. A. HOWARTH,W. HOYLE and B. J. WAKEFIELD, Tafantu, 1969, 16, 967. (Pharmaceutical Research Laboratory, Geigy (U.K.) Ltd., Trafford Park, Manchester 17, U.K.) Summary-5-Nitro-2-furaldoxime, 5-nitro-2-furaldehyde hydrazone, and several derivatives have been prepared, and their stereochemistry studied by NMR. The relationship between the structures of the compounds and their in vitro and in vivo antimicrobial activity was investigated.

xv

xvi

AHHOT~HH

cTaTei

I43YYEHkIE HEKOTOPbIX TISIPI4~IUI3AME~EHHbIX IIllPABIlHOB KAK AHAJIBTHYECKBX PEAI’EHTOB: W. I. STEPHEN, Z'alunta,1969, 16, 939. PesIoMe-B pe3ynbTaTe cpaBHeKHa J.uecTb Z-nnpn~nn II 2(6-MeTHnIIEipHflHn)IIpOIl3BOAHbIXIIHpa3HHa B KageCTBe XpOMOreKHbIXpeareKToBT~na~eppo~Ha~KynpO~Ha2,3,5,6-TeTpaK~C(2'-IIllpHgLln) IIMpa3ZiH OKa3aJICFI BbICOKOqyBCTBElTenbHbIM peareKToM AJIR wenesa(II); 2,3-6nc(2'-nap~~~n)-5,6-~ww~poIuipa3EIH 12 2,3-6nC[2'-(6'-MeTnnHnpH@n)]-5,6-flHrH~ponHpa3&ui IIOK33bIBaIOT BbICOKyH) gyBCTBI%TenbHOCTb II XapaKTepHCTHsecKylo~bI~0~y~~36~paTe~bHOCTbB~xpeaKq~rixc~eneaoM(II) M MegbIO(I), COOTBeTCBeHHO. PeaKqHR C MenbIO(I) HOqTIl AOCTEIFLeT =iyBCTBHTeJIbHOCTb 63TOKyHpOllHa. BbICOKOOKpaHIeHHbIe XeJIaTbI MeTaJIJIOB JIeI'KO 03BJIeKaIOTCR HeCMeLUHBaH)lQ~MHCH PaCTBOpHTeJIHMEl o6pa3yH CTa6WIbHbIe paCTBOpbI, HO3TOMy 3TH peareHTbI HaBnHmTcH Hoze3Kbndn B 0npeAeneKma cneAoBbIx KOJIElgeCTBHCeJIe3aH MeAH.

I-IPHMEHEHLlE B AHAJIBBE IcOOP~tiHAI@IOHHbIX COEfiBHEHBB: J. N. BRAZIER, i%hntQ, 1969, 16, 949. Pe3IOMC+npHBeAeH 0630~ IIp&¶MeHeHHFIKOMllJleKCOB MeTaJIJIOB B pa3Hax o6nacTsx anannTwIecKOP XHMBH,CC~IJI~R~~ B oco6eHHOCTIl Ha HOBbIe peaPeHTbI H HOBbIe IlpHMeHeHHR yYpemAeHHhIx peareHTOB. 06CymAeHM OCaA~TeJIH,TElTpHMeTpWleCK~e peal-eHTbI, IlHAElKaTOpbIH peaPeHTbI HJIH 3KCTpal'MpOBaHHH paCTBOpclTeJlHMH. BKnmueH HOBbla MeTOA BeCOBOrO OnpeneneHLlrr 30JIOTa Ctipanc-JJlSxJlop6Kc(~T~JI~H@~ME~H)KO~;LJI~T(~II)XJIO~M~OM.

OTHOIIIEHLlE CTPYICTYPbI FI AKTLlBHOCTB HEKOTOPbIX 5-HI4TPO-2-~YPAJIb~EI’IQOKCItMOB I4 FBAPASOHOB: G. A. HOWARTH, W.Hona 967.

and B.J. WAKEFIELD, TQlQntQ,1969,16,

Pe3IOMe--flpEITOTOBJreHbI 5-HEiTpO-2-@ypaJXbAOKCEIM, lWApa3OH 5-HHTpO-2-$IypaJIbJ&erHAaH HeKOTOpbIe EIX AepHBaTbl EI El3yqeHa MX CTepeOXHMWl C HpEiMeHeHHeM MeTO@ HMP. klCCJIeAOBaH0 OTHOIUeHlle MeH(AyCTpyKTypOti 3TIlXCOeAMHeHId H HX ELHTHMEIKpO6HOi aKTHBHOCTbI0 '&Vitro IIinViV0.

Summaries for card indexes

Effect of pH on concentration of species present in aqueous solutions of carbonyl compounds affected by hydration-dehydration and keto-enol equilibria: D. BARNES and P. Z&AN, TuZa&, 1969, 16, 975. (Department of Chemistry, University of Birmingham, P.O. Box 363, Birmingham 15, U.K.) Snnnnary-Equations have been derived for hydration-dehydration and keto-enol equilibria of carbonyl compounds, showing the changes, with pH, of individual species present in aqueous solutions. An Egtran computer program has been constructed, so that the pHvariation of individual species for widely varying values of equilibrium constants can be evaluated. The treatment enables isolation of individual equilibrium constants from experimental data and identification of the system involved. The ratios of hydrated and nonhydrated, as well as of keto and enol forms, are pH-independent.

The teaching of analytical chemistry in the United Kingdom before 1914: D. BEITERIDGE, Talanfa, 1969, 16, 995. (Chemistry Department, University College of Swansea, Wales.) Snmrnary-The history of the teaching of analytical chemistry in the United Kingdom before 1914 is described. The development is placed within the context of the growth of chemical teaching through the 19th century. It is shown that the methods adopted derived mainly from German authors, in particular Fresenius, and that native authors were not as influential, although their works had many desirable features. It is argued that the place of analysis within the curriculum was fixed in an incongruous position because of the early development of national examinations. It is also argued that the advantages of teaching analytical chemistry have been demonstrated, but that the benefits have not always been realized because of conservatism and the failure to establish a research school in analytical chemistry.

xvii

XVIII

..

AmxoTaqm

cTaTel

3dimEECT pH HA KOHqEHTPAQWO POAOB COEJJHHEHkIn IIPIJCYTCTBYIOQIJX B BOAHbIX PACTBOPAX KAPBOHMJICOEfiBHEHB~ HA KOTOPbIE BJIHFIIOT I’IJAPATA~IJIOHHO-AEl?IJAPATAqUOHHbIE I? KETO-3HOJIbHbIE PABHOBECBH: D. BARNESand P. ZUMAN, Talanta, 1969,16,9X. Pe3IoMe-BbIseAeHbIypaBHeHasnnarKiApaTaqtroHHo-AerIIApaTaqElOHHbIXEIKeTO-~HOJIbHbIXpaBHOBeCEl~Kap6oHEIJIH~xcoe~KHeHEl~, IIOKaayEOqHe IIepeMeHbI CpH HH~HBH~yaJIbHbIX pOAOB IipKCyTC~By10~kiX B BOAHbIX pacTBopax. PaapaBoTaHa aneKTpoKHoBbI9MCJIllTeJIbHaRIIpOrpaMMa 3FTpaH ~023BOJIflIO~afl BbIsIlCJIeHI4e BapIfaqlJH C pH HHAHBHAyanbHbIX pOJ(OB J(JIRBapHaqm KOHCTaHT paBHOBeCIlFI B IJIHpOKOM J(HaIIa3OHe. MeTog IIOBBOJIFIeT BbIAenHTb MHAMBHAyaJIbHbIe KOHCTaHTbJpaBHOBeCKK El8aKCIIepllMeHTaJIbH~X~aHHbIXHII~eHTH@i~pOBaTbBOBJIeUeHHyIO CHCTeMy. OTHOIIIeHHe I'EI~paTkipOBaHHbIX~HerI4~paTHpOBaHHbIX,li KeTO- II aHOJIbHbIX$OpM HeaaBHCLlMOOT pH.

IIPErIOAABAHBE COEAMH@HHOM D. BETERDGE,

AHAJIBTWIECKOB KOPOJIEBCTBE I’OAOM:

XHMBH B nEPEA 1914

Tdanta, 1969, 16, 995.

Pesmw-rIpmeAeHa m~opm npeno~asamm aKamTmecKol XkIMIlM B COeAHH@HHOM I-EOpOJIeBCTBeIIepeA 1914 rOAOM. Pa3BETIle llpEIKaBaH0 B KOHTeKCTe pa3BHTnH IlpeIlO~aBaHllHXHMKI4 B TeseHLle l%OrO CTOJIeTEIR. nOKa3aHO YTO yCBOeHHbIe MeTORb rJIaBHbIM o6paaoM IIpOllCXOjVZTOT HeMeqKKx aBTOpOB,OCO6eHHO OT @p33eHHyCa, M '4TO TyaeMHbIe aBTOpb1 He IIMeJIL2 OCO6eHHOrO BJIMFIHEIH,XOTR HX pa6oTbI IIOKa8bIBaJIEIAOBOnbHO IIOJIe3HbIe XapaKTepliCTMKH. BCTaBJIHBaeTCR BOIIpOC 0 HeCOOTBeTCBeHHOM IIOJIOHEeHMM aHaJlHTMKH B yse6KoM IlJIaHeBCJleACTBHe paHHOr0 pa3BKTEIFI HaqKOHaJIbHbIX DKaaMeHOB TaKme yKa3aHo =i~o IlpeIlMy~eCTBO npenofiasams aHamsrmecKol XETMl4El 6bmo AeMOHCTpKpOBaIiO, Ho IIpeKMyIQecTBa He BcerAa 06Hapy?KeHbI BCJIeACTBkfeKOHaepBaTEIBUaMa IIHeyEasE BOCCTaHOBEiTb HaysHOEiCCJle~OBaTeJlbHbIt CMep aHaJIEITH=IeCKOtiXHMEIH.

Summaries for card indexes

Reaction of mercury(U) and Xylenol OrangeI. Effect of the buffering media: A. CABRERA-MARTIN,J. L. PERAL-FERN~NDEZ,S. VICENTEPEREZ and F. BURRIEL-MARTY,Talanta, 1969, 16, 1023. (Departamento de Quimica Analltica, Facultad de Ciencias de la Universidad de Madrid, and C.S.I.C., Madrid, Spain.) Summary-The influence of the buffering medium on the reaction of H&II) with Xylenol Orange has been studied. Amine-type compounds are complexed by Hg(II)/Xylenol Orange with a sharp hyperchromic effect on the reagent itself, at 590nm. but complex formation of Hg(II)/Xylenol Orange in non-amine-type buffer, &h as citric acidnhosohate. &es a hvoochromic effect on Xvlenol Oranee at 580 nm. ‘Hg(Ii) is d&mined 2 pH 7.5 in two ranges hf concentrazon, 2-9 ppm in citrate buffer, measured at 580 nm (E = 2.50 x 103, and 6-11 ppm in hexamine buffer, at 590 nm (E = 4.18 x 103.

Applications of sensitivity diagrams to atomic-absorption flame photometry: J. RAMfREZ-Mugoz, Talantu, 1969, 16,1037. (Beckman Instruments Inc., Fullerton, California 92634, U.S.A.) Summary-Sensitivity diagrams have been applied to atomicabsorption work, in the form of plane and space diagrams. These diagrams facilitate the representation and comparison of the analytical behaviour of different elements in terms of percentual and fluctuational sensitivity. They also aid in the study of single elements under diverse experimental conditions or with different instruments. Space diagrams permit the representation and study of variations of sensitivity in the presence of one or more masking agents under the same or differing experimental conditions. Limiting interference ratios can easily be calculated with the help of diagrams of this type.

Xix

AHHoTaqHU cTaTe$i

PEAKqI?R

PTYTH(I1) C KCMJIEHOJIOPAHNEBbIM-I. 3WDEKT BYWDEPHOrO PACTBOPA:

A. CABRERA-MART~N,J.L.PERAL-FERN&DEZ, S. VICENTE-PEREZ and F. BURRIEL-MART& Tula~fa, 1969,16,1023.

Pemmm--IbyqeHo mmme Gy@jjepHoropacTBopa na peaKqwo pTyTH(II)CKCIiJIeHOJIOpaHX(eBbIM. AMEIHOCOeAL2HeHYIH o6paayIoT KOMnJIeKCbI C pTyTb(II)/KCIUleHOJlOpaHECeBblM C CHJlbHbIM I'HIIepXpOMHbIM BI@jeKTOMHapeareHT lTpll590HM,HO KOMnJIeKcoo6pa3oBaHne pTyTb(II)/KCHJleHOJlOpaH)Ka B HeaMLlHOBOM 6y+jjepe,HanpnMep B pacTBope JIHMOHHO~KkicnoTbI M @oc$aTa. HMeeT r&ilIOXpOMHOeAeiCTBLleHa KCWleHOJIOp3H~eBblik lIpI% 580 HM. P~y~b(11)onpeAennIoTnpn pH 7,5 B AB~X npenenax KOHIJ,eHTpaI@+%9 Mr/JIB UHTpaTHOM By@+epe, C ll3MepeHtreM CBeTOnOrJIOJqeHEin npn 580 HM (E= 2,50 X lo'),11 6-11 Mr/JIB 6y@@epHOM paCTBOpe TeKCaMEIHa,C H3MepeHHeM CBeTOnOrJIOWeHEln IIpE590 NM (E= 4,18 X 104).

IIPBMEHEH’CIE AUAI’PAMM B ATOMHO-ABCOPB~tlOHHOB

9YBCTBBTEJIbHOCTtI @OTOMETPBB:

J. RAM~REZ-MuRoz, Tdanra, 1969,16,1037.

Pe3IOMe--&IarpaMMbIYyBCTBMTeJlbHOCTYI IIpElMeHeHbI B aTOMHOa6cop6qlzoHHotIjjOTOMeTpIiEI, B @OpMe IlJIOCKElX EInp0CT0p~b1X AHarpahfM. ~TEZAxarpaMMbI o6neruaIoTH306pameHme EI CpaBHefnfe aHaJIEITH4ecKoB xapaKTepxwcnKn paaabIx aneMeHTo3 B $OpMe npOqeHTyaJlbHOi% Ei(PJlIOKTya~IIOHHOti 9yBCTBIITeJlbHOCTH. OHIf TaKHEe nOJIe3HbIB I13yYeHLIEI OTAeJIbHbIXWIeMeHTOB B p33JIlNHblX3KCnepMMeHTaJIbHbIX yCJrOB&%nXEiJIHC ElCnOJlbE%OBaHHeM pa3JIH~HMX npH60pOB. HpOCTOpHbIe AIiarpaMMbInO3BOJIFIIOT nso6paxteHHeH Il3yleHHeBapEiaL@ gyBCTBHTeJIbHOCTH B ~PHCYTCTBMH OAIIoroHJIE~ 6onblue MaCKHpyIoIqnXBreHTOB B TeX me CaMbIXElJILl pa3JIHqHbIX 3KCnepHMeHTaJIbHbIX yMOBMJ?X. npeAeJIHbIe OTHOIIIeHHfI BJIMSIHUR MOX(H0 BbIWICJIHTb C nOMOLqbl0 AHarpaMM aTor Taua.

Summaries for card indexes

A review of non-gravbnetric methods of determining carbon dioxide and monoxide: D. H. DAVIES, I”‘Zantu, 1969, 16, 1055. (Kilburn Polytechnic, 373 Edgware Road, London, N.W. 9.) Summary-The titrimetric and instrumental methods of measuring amounts of carbon dioxide and instrumental methods for carbon monoxide are reviewed.

The subterranean waters of Tenerife-I. Origin and chemical characteristics: E. FERNANDEZCALDASand V. %REZ GARCIA, Tulantu, 1969, 16, 1067. (Centro de Edafologia y Biologia Aplicada de Tenerife, Cabildo Insular de Tenerife, Santa Criz de Tenerife, Canary Islands.) Summary-A systematic study has been made of the chemical characteristics of the subterranean waters of Tenerife from all sources, including galleries, wells, and springs. All the constituents and characteristics of agricultural interest have been considered. A marked dependence was observed between the characteristics of the water and the situation of the sources, and a study was made of the principal types of geological formation which determine the presence of subterranean accumulations of water at different levels of the island.

Determination of metals in phospholipids by atomic-absorption spectrophotometry: B. MONTFORDand S. C.CRIBBS, Talnntu, 1969, 16, 1079. (Chemical Technology Branch, Atomic Energy of Canada Limited, Whiteshell Nuclear Research Establishment, Pinawa, Manitoba. Canada.) Summary_-A procedure is described for the determination of sodium, potassium, calcium, magnesium and manganese in phospholipids by atomic-absorption snectronhotometrv. The method uses a solution of phospholipidlin isopkntyl acetate; phosphate interference is controlled by the addition of aqueous lanthanum chloride solution homogenized with ethanol. Standards are prepared in a similar solvent mixture. A comparison between the described method and that of standard additions show it to be free of phospholipid matrix effects. 26

xxi

xxii

OB3OP HEI’PABMMETPBYECKkIX METOAOB OIIPEAEJIEHBR JJ,BYOECBCEI.I4 OECIJCB YI’JIEPOAA. D. H. DAVIES, Talantu, 1969, 16, 1055. PWIoMt?--nptrBeAeH 06aop THTpMMeTpWieCKHXEI HHMTpyMeHTanbHbIx MeToAoB 0npeAeJIensiRABYOKIWHyrnepona II M~cTpyMeHTaJlbHKXMeTOAOBOllpeAeJleHHR OKUCEl yNlepOAa.

IIOA3EMHbIE BOAbI TEHEPBQM-I. rIPOtICXO%fCAEHkIE I4 XLIMWIECICBE XAPAKTEPBCTBKB: E. FERNKNDEZ CALDASand V. F%REZGARCIA,Talantu, 1969,16,1067. &3IOMe-CkWTeMaTWiecKH HayqeHbI XEIMHqeCKHe XapaKTepHCTHKMIIOA8eMHbIXBOA TeHepK@ BCeX MeCTOpOH(AeHllfi-II3 IWIJIepet, KOJIOAIJeB EI EICTO9HEIKOB. PaCCMOTpeHbI BCe KOMnOHeHTbl II XapaKTepHCTElKM mTepecKbIe AJIfl arpIfKyJlTypbl. 06Hapy3KeHa BbIpa?KeHHaR 3aBHCHMOCTb XapaKTepllCTHKM BOAId OT MeCTOnOZOZKeHHJJ HCTOUHMKa II Hay'IeHbI PJlaBHbIe KJlaCCbI reojIormecKKx @opMa@k, onpe~enmonqnx npmyTcTBkie nogaeMHFJXHaKOnJleHUtiBO~blHapaWIWIHbIXypOBHFiXOCTpOBa.

ORPEAEJIEHBE METAJIJIOB B QOC~OJIBIIOBAAX METOAOM ATOMHO-ABCOPBuBOHHOn UIEKTPO~OTOMETPBB: B. MONTFORDand S. C. CRIBBS,Talantu, 1969,16,1079. PesIoMeOnIlCaHMeTOAOnpeAeJreHHsHaTpEZR,KaJIIIR,Kanb~nR, Marmm M MapraKqa B ~oc@onmoK~ax c npaMeKemeM aToMHoa6cop6qKoKHoti CneKTpO+OTOMeTpEIn. MeTOA nonb3yeTcR paCTBOSOM$joc~onnnosi~a B moneKTnnaqeTaTe, a mmme @oc@opa EICKJIH)~eHO~O6aB~eHKeM~OMO~eHEl~IlpOBaHHOrO3TkiJIOBbIMCnMpTOM BOAHOrO paCTBOpaXJIOpKAaJIaHTaHa. aTaJIOHHbIepaCTBOpb1 IIpHrOTOBJfeHbI C nOAO6HOB CMeCbIO paCTBOp&lTeJIek CpaBHeHHe OnHCaHHOrO MeTOAa C MeTOAOM CTaHAapTHbIX AO6aBJIeHIiii noKaaxBaeT OTCyTCTBlle MaTpWiHbIX @~eKTOB ~O~I$O~IUIOI~~OB.

Summaries for card indexes

Determination of trace amounts of antimony by spectrofluorimetry in hydrobromic acid medium at liquid nitrogen temperature: G. F. KIRKBRIGHT, C. G. SAW, J. V. THOMPSONand T. S. WEST, Talanta, 1969, 16, 1081. (Chemistry Department, Imperial College, London, S.W.7, U.K.) Summary-Trace amounts of antimony(II1) may be determined in 6M hydrobromic acid by measurement of the red fluorescence of its bromide complex at -196”, the optimum wavelengths of excitation and emission (360 and 586 nm respectively) being used. Calibration graphs are linear between 0.01 and 0.25 ppm. The effect of the presence of 50-fold molar amounts of 55 foreign ions has been studied. Of the ions studied, only iron(II1) and tellurium(IV) interfere, and these may be tolerated at the 50- and 20-fold levels respectively. A lOOO-fold molar amount of arsenic(II1) causes no interference.

Determination of ammonia in tobacco and smoke: CORAW. AYERS, Talanta, 1969, 16, 1085. (Research and Development Establishment, British-American Tobacco Co. Ltd., Southampton, U.K.) Summary-A gas chromatographic method has been developed for the determination of ammonia in tobacco and smoke. Ammonia is liberated from tobacco by a microdiffusion technique using a Conway diffusion cell. Bubbler traps containing dilute sulphuric acid are used to collect the ammonia from smoke.

Semiquantitative determination of ajmaline by the Weisz ring-oven technique: R. A. SHAH and NARGISHU~~AIN,Talanta, 1969,16,1088. (Central Laboratories, P.C.S.I.R., Karachi.) Summa~--Ajmaline haa been determined semiquantitatively with p-dimethylaminobenzaidehyde as reagent, with an error of f2%.

The solubility product of cadmium sulphide: R. BELCHER, J. P. G. FARR and A. TOWNSIIEND, Talanta, 1969,16,1089. (Chemistry Department, The University, P.O. Box 363, Birmingham 15.) Summary-The solubility product of cadmium sulphide has been measured in three acidic media by precipitation and dissolution techniques. The values of log KS, after correction for complex formation are -27.3 f 0.6 in all the media examined. An X-rav and microscopic examination of the precipitates shows an increase in crystallinity on aging, although Ostwald ripening was not observed.

...

XXIII

xxiv

AHHOTaqllll CTaTeii

OrIPEfiEJIEHBE CJIEflOBbIX ICOJIHqECTB CYPbMbI CIIEKTPOcDJIYOPOMETPUYECKmM METOAOM B PACTBOPE BPOMItCTOBOQOPOAHOm KEICJIOTbI IIPU TEMlIEPATYPE TEICYYEI’O ASOTA: G.

F. KIRKBRIGHT,C, G, SAW, J.V. THOMPSON and T. S. WEST, Talanta, 1969, 16, 1081.

PeuoMe-OnpeneneHbI cnenoBbIeKonKqecTBa cypbMhI(II1) B 6M paCTBOpe 6pOMaCTOBO~OpO~HOl%KHCJlOTbI 113MepeHHeMKpaCHOi @IyOpeCqeHqHH ee ~~oMM~HOI'OKOMIlJleKCa IIpI4 -196", llOJIb8yHCb OIITEMaJlbHblMH AJlllHaMIl BOJIHBO36y?KAeHEis Ei3MHCCElIi (360m 586 HM,COOTB~CTB~HHO).IIOJIyseHbI nllHetiHbIe KanK6paKllOHHbIerpa@IKn B IIpeAeJIaX0,01-0,25 Ml$I. Hayqemo BJlHRHHe59KpaTHbIX MOJlHpHbnrHa6nTKOB 55 EpyI'llX EIOHOB. Ma BTIlX~OHOB TOJIbKO HteJreao(II1) II Tennyp(xv) MerJIaIoT onpeAeneazu0,HO MemaHHe TepnnMoe Ha 50KpaTHhIx II 20KpaTHbIX ypOBHHX, COOTBeTCTBeHHO.1990KpaTHbIfi MOjIHpHbIti 1236bITOK MbIILIbRKa(III)He MeIIIaeT onpe~eneamro.

OIJPEfiEJIEHHE

AMMI/IAKA

B TAEAKE

Id AbIME:

CORA W. AYERS, Talanta, 1969, 16, 1085.

nnfi Pe3P%Ie---Pa3pa6OTaHMeTOn raaoBoi xpoMaTorpa@n OllpeAeJIeHHH aMMHaKaB Ta6aKe IIAblMe.AMMHaKBbIAeJIHH)T HL? Ta6aKa MHKpOAB$.@y8HOHHbIM MeTOAOM C ElCIlOJIbBOBaHlleM HOHBeH AH+@y8HOHHOti KJIeTKH. Bap6OTepbIC paa6aBJIeHHOti CepHOtiKBCJIOTO~~ rroc~~y~~n~~nac6opa aMMMaKa113 AbIMa.

IIOJIYKOJUI4ECTBEHHbI~ METOg AmMAJIllHA C MUIOJIb30BAHBEM IIEgR BEmCA:

OIIPEAEJIEHklR KOJIbqEBOm

R. A. SHAH and NARGIS HUSSAIN,Tdunta, 1969,16,1088.

Peslon~eA~~an~~Onpe~eneanOnyKOn~~eCBTeHHOCn-~~MeTa~aMAH06eH3aJIbAerRAOM B KaYeCTBepeareHTa,C OUIll6KOZt i2%.

IIPOAYKT

PACTBOPBMOCTi’I

R. BELCHER, J. I?.G. FARR 16, 1089.

KAAMBflCYJIb@BjJA:

and A. TOWNSHEND, Tuhta,

1969,

PesIOMe--npOAyKT PaCTBOpHMOCTH KafiMHiCyJIb@iAa 6bInmaMepeH B TpeX KI4CJlblX CpeAaX C IIpHMeHeHHeMMeTOAOB OCamAeHElR H paCTBOpeHHR. BeJIllvllHbI IOg K sO nocne nonpanKn gnH KOMCpeAaX. nneKCOO6paBOBaHHR -27,3 B BCeX HCCJIeAOBaNHbIX B3yqeHIleOCaAKOB MHKpOCKOnEZ9eCKBMIIPeHTreHOBCKHM MeTOAaMM IIOKaaamOBO3paCTaHHe KpEiCTaJImHqHOCTR C CTapeHEleM, XOTbR OCTBaJIAaCOapeBaHHeHe Ha6JIIOAaJIOCb.

Summaries for card indexes

Some aspects of “chemical” interferences in atomicabsorption spectroscopy: VEDULAS. SASTRI,CHUNI L. CHAKRABARTIand DOUGLAS E. WILLIS, Talanta, 1969, 16, 1093. (Chemistry Department, Carleton University, Ottawa 1, Ontario, Canada.) Stunmary-Studies on the mutual chemical interferences in the atomic-absorption spectroscopy of Ca, Mg, Ba, Sr, Ti, Zr, Hf, Fe, as simple salts and metallocenes, show that the results can be interpreted in terms of formation of mixed oxides of two elements, non-volatility of the mixed oxide compound, and the crystal structure of the mixed oxide compound.

Studies on the stability of dithiecarbamic acids: Krrrro I. A~PILA, VEDULAS. SASTRIand CHUNI L. CHAKRABARTI, Tulantu, 1969,16,1099. (Chemistry Department, Carleton University, Ottawa 1, Ontario, Canada.) Summary-The influence of the substituent on the nitrogen atom with respect to the rate and pattern of decomposition of N,N-disubstituted dithiocarbamic acids has been studied. The rates of decomposition with respect to such variables as pH, temperature (activation parameters) and heavy water medium (solvent isotope effect), have been determined, and a mechanism to accommodate the observed results has been proposed.

Substituted phenothiazines as indicators in the ferrocyanide titration of zinc: H. SANKE GOWDA and B. KESAVAN,Tahta, 1969, 16, 1103. (Department of Chemistry, Manasa Gangotri, University of Mysore, Mysore, India.) Summary-Chlorpromazine, promethazine and diethazine hydrochlorides and prochlorperazine maleate have been tested as indicators in the ferrocyanide titration of zinc. Only the first and last are useful, giving a sharp reversible colour change in both the direct and reverse titrations, but the results are negatively biased by 0.2-l .3 %.

xxv

xxvi

Ammaqm

cTaTetl

HEICOTOPbIE B3I’JIFIAbI “XBMMYECKBX” MEIIIAHElm B METOAE ATOMHO-ABCOPBqMOHHOm CIIEKTPOCKOI-IHIJ:

VEDULA S. SASTRI,CIRJNIL. CHAKRABARTIand DOUGLAS E.WILLIS, Talanta, 1969,16,1093.

Pe3IOMe--&yYeHIie XHME19eCKHX B33HMOnefiCTBHti B BTOMHOa6cop6qxomoP

cnewrpcxonm

Ce, Mg, Ba, Sr, Ti, Zr, Hf II Fe

B @OpMe npOCTaX COJIefi M MeTaJIJIOqeHOB nOK333JIO'iT0pe3yJIbT3TbI MOHCHO TOJIKOBaTbo6paaoBameM CMelllaHHblX OKHCJlet AByX NleMeHTOB,HeJIeTyqeCTH CMeIUaHHOti OKMCIlIiCTpyKTypbl KpHCTaJlGlCMeJ.lIaHHOt OKHCK.

B3Y=IEHBE

YCTO~WIBOCTB ABTBOKAPBAM&IHOBbIX KBCJIOT:

KBIJO I. ASPILA,VEDIJLAS. SASTRIand CHUNI L. CHAKRABARTI, Talanta, 1969,16,

1099.

Pe3IoMfLIfi3y9eHOBJIKHHHe 3aMeCTHTem Ha aTOMe aaoTa Ha CKOpOCTb II HNIpaBJIeHIle p33JlOHteHHR N,N-nByX33MeQeHHbIX @iTHOKap63MHHOBbIXKEICJIOT. OnpeAeneHbICKOpOCTH p33JIOxteHMH B 33BElCHMOCTHOT pH, TeMtIepaTypbI(3KTKBqHOHHbIe nap3MeTpbI)K B THIKeJIOt Bone (3l&$eKT U30TOna paCTBOpIiTeJI@ I4npe@lO~eH MeXaHK3M npKHKMBIOJI@ BO BHIlMaHIle nOJly9eHHbIepe3yJIbTaTbI.

3AMEIQEHHbIE DEHOTBA3HHbI llHJ@IKATOPbI AJIR TLlTPAqElll QEPPOIJI4AHBAOM:

KAK qI4HIcA

H. SANKE GOWDA and B. KESAVAN, Talantu, 1969, 16, 1103.

Pe3~Me-XJIOpI4CTOBO~OpO~HbIti XJIOpnpOM33KH,npOMeT33HH tr All3T33HHIIM3~eHElOBOKIlC~bI~npOX~Op~ep33llH6bI~~~C~bIT3H~ B KZlgeCTBe ElHAIlKaTOpOB AJIHTIlTpOBaHtlR qIlHK3@eppOqMaHHROM. TOJIbKOnepBbIti EInOCJIeAHbIti H3 3THX COeAElHeHElfi OK333mcb no~e3KbIiqmemrqHe 0cTpKe perrepmpyehme nepeMeKbI JJBeT3K3K B npRMIlX T3K EI B 06paTHbIX TIITpOBBHHRX,HO pe3yJIbTaTbI HM%e 33 0,2-1,3x.

Summaries for card indexes

Aaillytical utility of bimetallic teraary complexes of Alizarin Fluorine Blue. Spectrophotometric determination of nickel: M. A. LEONARD and F. I. NAGI, Talanta, 1969,16, 1104. (Department of Analytical Chemistry, Queen’s University, Belfast, N. Ireland.) Sag-Mixtu~s of La*+ and Nip+ ions form with Alizarin Fluorine Blue (1,2-dihy~oxy~~aquinon-3-ylme~ylam~e-~,~dia~etic acid; AFl3) the ternary complex (AEB),La.Ni*- which has maximum light absorption at 550 nm (6 = I.13 x 10”); Kcond = 1.9 x lo6 l.mole+ at pH 4.5 and 25”, ionic strength = 0.1. The use of this complex for the photometric determination of nickel has been investigated.

Xnfrared emission of organic compounds stimulated by a laser beam: J. W. ROBINSON,D. M. HAILEYand H. M. BARNES,Tuiunta, 1969,16, 1109. (Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803, U.S.A.) Summary-A modified long-pathlength cell is described for laserexcitation of infrared emission spectra. The sensitivity of detection is about 1 n&I. for acetone and methyl iodide.

Microdetermination of carbon and hydrogen in triterpenoids: Y. A. GAWARCXOUSand A. B. FARAG, Tdanta, 1969, 16, 1112. (National Research Centre, Dokki, Cairo, U.A.R.) Summary-For mi~~ete~ination of carbon and hydrogen in triterpenoids, the VeEe?a, Korshun and Belcher-Ingram rapid methods need modification. In the first method the CoJOI is activated with 1% NiO, in the second two silica spirals are introduced into the combustion tube, and in the third the sample is covered with Co,O, powder.

station of ~xa~ofe~ate~ with el~~ol~~~y generated octacyanomoIybdate(V): J. HERNANDEZ MENDEZ and F. LUCENA CONDE, Tdanta, 1969, 16, 1114. (Department0 de Q&mica Analitica de la Facultad de Ciencias, Seccic5n de Qufmica Analitica de1 C.S.I.C., Salamanca, Spain.) Summary-The determination of hexacyanoferrate(II) with electrolytically generated octacyanomolybdate(V) at a platinum anode over a wide pH range is described. From 1 to 20 pequiv are determined with a relative standard deviation of 0.3 %.

xxvii

...

xxv111

AHHOTaqUH

CTaTei

BCIIOJIb30BAHHE B AHAJIH3E ABYMETAJIJIB=IECKLlX TPOaHklX ICOMIIJIEICCOB AJIB3APBH@TOPI’OJIY BOrO: CIIEKTPOQOTOMETPB?IECKOE OIIPEAEJIEHBE HHICEJIFI: M. A. LEONARD

and F. I. NAGI, Talanta, 1969, 16, 1104.

Pewome-CMecn La*+ II Ni*+ o6pasym c Anmsapm@coprony6mM (l,2-~MOKCIIaHTpaXHHOH-%IlJlMeTLlJlaMEIH-N,N-~HyKCyCHO~ KIICJIOTOB, A@r) TPOBHO~~ KoMnneKc (A@r)aLa.Nin-, Ko~oporo MaKCHMyM CBeTOIlOl'JlOlQeHHRJIemHT Ilpll 550 HMl& = I,13 X IO*/; KyoHA = I,0 X 10'JI.MOJIb-111pHpH4,5 II25"n~lOHHOli CHJIbI 0,l. I'I3yseHO IIpllMeHeHEle3TOrO KOMllJIeKCa B @OTOMeTpHYeCKOM Ollpe~eJIeHHIlHHKeJIH.

MHfDPAKPAkHAH 3MMCCkU-I OPI’AHMYECKHX COEAklHEHBkZ BbI3BAHA JIA3EPHbIM IIY=IIEOM:

J. W. ROBINSON,D. M.HAILEY

and H.M.BARNEs,

Tdanta, 1969,16,

1109. Pe3IOMe--OlIHCaHaH3MeHeHHaRKIOBeTKaC~JIHHHbIMOIITEl~eCKElM IlyTeM &JIR Boa6yxneHas Jla3epOM HHljjpaKpaCHbIX3MHCCMOHHkJX 06HapyHCeHKH I H+l aJWl CIIeKTpOB. gJ'BCTBMTenbHOCTb aqeToHan MeTHntIo&nEa.

MMKPOOIIPEAEJIEHHE Yl?JIEPOAA B TPBTEPIIEHOBAAX: Y. A. GAWARGIOUS

H BOAOPOAA

and A. B. FARAG, Talanta, 1969, 16, 1112.

Pesmw-&m MaKpoonpe~eneHHR yrnepona H Bo~opo~a B TpKTepIIeHOHAaX HaAO Il3MeHFITb MeTOAbI Besepa, I-EOpIIIyH M Benbsep-Ihrpahfa. B nepBoM cnyqae Co,O, aKTnBnpymT c 1% NiO, B ApyrOM MeTOAeBBOARTABe KpeMHeBbIX Cl-IHpaJIllB Tpy6Ky AJIfi COH(meHHR, a B TpeTbeM-IIpO6y 3aKpbItiaIoT HO~OEIKOBHAHbIMCOgOp.

OIIPEAEJIEHBE I’EICCAqkIAHO@EPPATA(II) 3JIEICTPOO BPA30BAHHbIM OKTAqtIAHOMOJI&,IBAATOM( J. HERNANDEZMENDEZ

andF. LUCENACONDE,

C

TaZanta,1969,16,1114.

Pesmme-OnmaKo 0npeAeneme reKcaqtiaKo@eppaTa(II) c 3JleKTpOO6pa30BaHHbIM OKTa~ElaHOMOJllf6~aTOM(V) Ha IlJlaTEIHOBOM aneKTpo&e B IIIH~OKOM AKanasoHe pH. MeTOAOM MOH(HO OIIpeAeJIFfTb1 A0 20 MK3KB C OTHOCIlTenbHOfi CTaHAapTHOti OIqEIBKOti0,3x.