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Determination of traces of mixed halides by activation analysis
ABSTRACTS
595
Determination of traces of mixed halides by activation analysis, J. F. Cosgrove, R. P. A specific, sensitive Bastian, and G. H. Morrison, Anal. Chem., 30, 1872 (1958). neutron activation analysis method is developed for determining trace amounts of After activation, iodide and bromide are halides in zinc sulfide phosphors. The method possesses a isolated by extraction and chloride by distillation. Serondary sensitivity pg. for chloride and iodide and 0.001 pg. for bromide. reactions during irradiation may interfere. Radiometric determination of small amounts of antimony, T. Ishimori and Ii. Ueno, Rull. Chem. Sot. Japan, 28, 200-200-202 (1955). Small amounts (l0.06 mg.) of Sb were determined by adding radioactive frans-dichlorobis (ethlenediamine) cobaltic chloride labeled with Cow. Radioactivation analysis of microquantities of uranium, H. Hamaguchi, Kagaku, 6,256-60 (1957). A review with 7 references is given.
Runseki
Microdetermination of carbon in super-purity aluminum, P. Albert, A. Nouaille, G. Chaudron, and P. Siie, Congr. Intern. Aluminum, Paris, 1954, 1, 191-93. Carbon was determined by measuring the b-activity of the radio-nitrogen in the irradiated specimen. Separation of Ce144from Pr 144, A. Bradley and M. Adamowicz, J. Chem. Educ., 36, 136-38 (1959). A classroom experiment in separating milligram quantities of cerium and praseodymium and following separation wit,h a Geiger munter is described. Siwaple evaporator for radioactive metals, I,. W. Barr and D. A. Blackburn, J. Sci. Instr., 36, 197 (1959). A simple and inexpensive device is described which restricts, the evaporant to a single disposable vessel. The drvire is used for vacuum evaporation of radioactive metals in tracer analysis. Action of r-rays frowb cobalt-60 on starch, V. F. Oreshko and K. A. Korotchenko, Nauch. Doklady Vysshii Shkolyi, Khiwl. i Khim. Tekhnol, 1958, No. 3, 455-59. The irradiation of concentrated gels of potat) st’nrch by y rays from cobalt-60 was carried with doses of 2.28,4.80, and 6.04 r. Quantitative evaluation of chromatograms by double decomposition with siwLple radioactive reagents-I., Z. J. Zubrzycki, A. Z. Budzynski, and I. G. Campbell, Talanta, 2, 165-70 (1959). Double decomposition radiochromatography has been developed for the radiometric estimation of saturated fatty acids, inorganic phosphates, and glucose-l-phosphates on paper chromatograms. The quantitative determination of fission and nuclear reaction products, C. E. Crouthamel, R. Heinrich, and C. Gatrousis, Talanta, 1, 396-407 (1958). Radiochemical and analytical methods adapted for nuclear fuel analysis are discussed, including paper chromatographic methods and scintillation spectrometry.
595
Determination of traces of mixed halides by activation analysis, J. F. Cosgrove, R. P. A specific, sensitive Bastian, and G. H. Morrison, Anal. Chem., 30, 1872 (1958). neutron activation analysis method is developed for determining trace amounts of After activation, iodide and bromide are halides in zinc sulfide phosphors. The method possesses a isolated by extraction and chloride by distillation. Serondary sensitivity pg. for chloride and iodide and 0.001 pg. for bromide. reactions during irradiation may interfere. Radiometric determination of small amounts of antimony, T. Ishimori and Ii. Ueno, Rull. Chem. Sot. Japan, 28, 200-200-202 (1955). Small amounts (l0.06 mg.) of Sb were determined by adding radioactive frans-dichlorobis (ethlenediamine) cobaltic chloride labeled with Cow. Radioactivation analysis of microquantities of uranium, H. Hamaguchi, Kagaku, 6,256-60 (1957). A review with 7 references is given.
Runseki
Microdetermination of carbon in super-purity aluminum, P. Albert, A. Nouaille, G. Chaudron, and P. Siie, Congr. Intern. Aluminum, Paris, 1954, 1, 191-93. Carbon was determined by measuring the b-activity of the radio-nitrogen in the irradiated specimen. Separation of Ce144from Pr 144, A. Bradley and M. Adamowicz, J. Chem. Educ., 36, 136-38 (1959). A classroom experiment in separating milligram quantities of cerium and praseodymium and following separation wit,h a Geiger munter is described. Siwaple evaporator for radioactive metals, I,. W. Barr and D. A. Blackburn, J. Sci. Instr., 36, 197 (1959). A simple and inexpensive device is described which restricts, the evaporant to a single disposable vessel. The drvire is used for vacuum evaporation of radioactive metals in tracer analysis. Action of r-rays frowb cobalt-60 on starch, V. F. Oreshko and K. A. Korotchenko, Nauch. Doklady Vysshii Shkolyi, Khiwl. i Khim. Tekhnol, 1958, No. 3, 455-59. The irradiation of concentrated gels of potat) st’nrch by y rays from cobalt-60 was carried with doses of 2.28,4.80, and 6.04 r. Quantitative evaluation of chromatograms by double decomposition with siwLple radioactive reagents-I., Z. J. Zubrzycki, A. Z. Budzynski, and I. G. Campbell, Talanta, 2, 165-70 (1959). Double decomposition radiochromatography has been developed for the radiometric estimation of saturated fatty acids, inorganic phosphates, and glucose-l-phosphates on paper chromatograms. The quantitative determination of fission and nuclear reaction products, C. E. Crouthamel, R. Heinrich, and C. Gatrousis, Talanta, 1, 396-407 (1958). Radiochemical and analytical methods adapted for nuclear fuel analysis are discussed, including paper chromatographic methods and scintillation spectrometry.