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A highly sensitive determination of sulfur and the simultaneous determination of carbon and sulfur with a recording conductivity instrument
ABSTRACTS in organic compounds flask method, followed
587
involves decomposition of the sample by the Schiiniger by an improved ferric salicylate calorimetric analysis.
A highly sensitive determination of sulfur and the simulianeous determination of carbon and sulfur with a recording conductivity instrument, W. Koch, S. Echard, and H. Malissa, Arch. Eisenhuttenw., 29, 543-46 (1958). An apparatus is described which can be used for simultaneous determination of very small amounts of C and S in samples of 0.552 mg. in about 3 min. Estiwlation of reserpine iu pharmaceuticul preparations, G. L. Szendey, Arch. Pharm., 291,215-18 (1958). il method is described for the estimation of reserpine in t,he presence of larger amount,s of theophylline in tablets or pills. A specific cclorituelric method oJ estimation oJ phlorrhizin in biologicalfluids, E’. H. Jenner and D. H. Smyth, Biochem. J., 71, No. 1, 138-50 (1959). A simple colorimetric method is described for the estimation of phlorrhizin in biological fluids. Microcolorimetric meth,od for the determinution of yuinic acid and its contents in jtue-cured tobacco, WI. Nagasawa, Bull. Agr. Chem. Sot. Japan, 22, 205-207 (1958). After treatment with sodium periodate and nitroprusside-piperazine solutions, 25-120 pg. quinic acid may be determined at 390 mN. il wet combustion method Jar the w~cro-, micro-, and submicrodeterminalion of carborc in organic cowcpounds, F. Allam and A. H. Agiza, Bull. Pac. Agr., Cairo Univ., No. 28, l-16 (1953). A modified Pregl combustion met.hod in which the CO% is determined tit,rimetrically is described. Microtitration of proteins, A. C. Maehly, Bull. schweiz. Akad. med. Wiss., 11, 433 (1955). Determinations of horse radish peroxidases are described. Polarcgraphic determination of 2-dimethylaminoethyl p-butylaminobenzoate, B. Novotny. Ceskoslov. furw~., 3, 12-13 (1954). To 0.4-0.8 mg of sample are added HC1, NaNOs, NaOH, and gelatin. The halfwave potential is 1.7 v. vs. S.C.E. dlicrodetermination oj alhoxy groups, M. Vecera and A. Spevak, Chem. listy, 52. 15’LO-25 (1958). A method of mi~rodeterminat~ion of alkoxy groups from methoxy t.o butoxy is described which involves adsorption on solid tartar emetic on silica is described. .1/icroassay of chlorirx in ot’yanic coukpounds by coukbustion in an empty tube, &I. Veccra and J. Bulusck, Chem. lisly, 52, 15’1636 (1958). 111a procedure for microdetermination of Cl, the compound is heated at 720” C. in a stream of O,, the Cl produced is absorbed in HZ(I)2 and then titrated with AgNOI with Brilliant Yellow as indicator. Zdenti)ication and determination of 0- and iT-benzal groups, 111. Jurecek and K. Obruba, Chem. listy, 52, 2066-72 (1958). il semimicro- and micromethod based
587
involves decomposition of the sample by the Schiiniger by an improved ferric salicylate calorimetric analysis.
A highly sensitive determination of sulfur and the simulianeous determination of carbon and sulfur with a recording conductivity instrument, W. Koch, S. Echard, and H. Malissa, Arch. Eisenhuttenw., 29, 543-46 (1958). An apparatus is described which can be used for simultaneous determination of very small amounts of C and S in samples of 0.552 mg. in about 3 min. Estiwlation of reserpine iu pharmaceuticul preparations, G. L. Szendey, Arch. Pharm., 291,215-18 (1958). il method is described for the estimation of reserpine in t,he presence of larger amount,s of theophylline in tablets or pills. A specific cclorituelric method oJ estimation oJ phlorrhizin in biologicalfluids, E’. H. Jenner and D. H. Smyth, Biochem. J., 71, No. 1, 138-50 (1959). A simple colorimetric method is described for the estimation of phlorrhizin in biological fluids. Microcolorimetric meth,od for the determinution of yuinic acid and its contents in jtue-cured tobacco, WI. Nagasawa, Bull. Agr. Chem. Sot. Japan, 22, 205-207 (1958). After treatment with sodium periodate and nitroprusside-piperazine solutions, 25-120 pg. quinic acid may be determined at 390 mN. il wet combustion method Jar the w~cro-, micro-, and submicrodeterminalion of carborc in organic cowcpounds, F. Allam and A. H. Agiza, Bull. Pac. Agr., Cairo Univ., No. 28, l-16 (1953). A modified Pregl combustion met.hod in which the CO% is determined tit,rimetrically is described. Microtitration of proteins, A. C. Maehly, Bull. schweiz. Akad. med. Wiss., 11, 433 (1955). Determinations of horse radish peroxidases are described. Polarcgraphic determination of 2-dimethylaminoethyl p-butylaminobenzoate, B. Novotny. Ceskoslov. furw~., 3, 12-13 (1954). To 0.4-0.8 mg of sample are added HC1, NaNOs, NaOH, and gelatin. The halfwave potential is 1.7 v. vs. S.C.E. dlicrodetermination oj alhoxy groups, M. Vecera and A. Spevak, Chem. listy, 52. 15’LO-25 (1958). A method of mi~rodeterminat~ion of alkoxy groups from methoxy t.o butoxy is described which involves adsorption on solid tartar emetic on silica is described. .1/icroassay of chlorirx in ot’yanic coukpounds by coukbustion in an empty tube, &I. Veccra and J. Bulusck, Chem. lisly, 52, 15’1636 (1958). 111a procedure for microdetermination of Cl, the compound is heated at 720” C. in a stream of O,, the Cl produced is absorbed in HZ(I)2 and then titrated with AgNOI with Brilliant Yellow as indicator. Zdenti)ication and determination of 0- and iT-benzal groups, 111. Jurecek and K. Obruba, Chem. listy, 52, 2066-72 (1958). il semimicro- and micromethod based