Reference

Extraction-photometric determination of titanium after separation of it from chromium, cobalt, and nickel by a chloroform solution of

Extraction-photometric determination of titanium after separation of it from chromium, cobalt, and nickel by a chloroform solution of .alpha.-bromobutyric acid containing 1-phenyl-3-methyl-5-pyrazolone. Pyatnitskii, I. V.; Simonenko, V. I. (Kiev. Gos. Univ. im. Shevchenko, Kiev, USSR). Ukr. Khim. Zh. (Russ. Ed.), 42(7), 747-9 (Russian) 1976. CODEN: UKZHAU. DOCUMENT TYPE: Journal CA Section: 79 (Inorganic Analytical Chemistry) Ti(IV) was extd. at pH 2.5-3.5 from aq. solns. contg. Cr3+, Co2+, and Ni2+ by using CHCl3 contg. 2.5M .alpha.-bromobutyric acid and 0. 80-58-0 and 89-25-8 are also in the experiment.1M 1-phenyl-3-methyl-5-pyrazolone. Ti was then detd. by measuring the absorbance of the org. phase at 400 nm. The sensitivity was 10 .mu.g Ti/mL. The relative errors were 1.3-8.3% for the detn. of 0.48-2.40 mg Ti. .

Chemical preparation of labeled

Chemical preparation of labeled .alpha.-bromobutyric acid. De Almeida, M.; Barberio, J. C.; Cova, W. G.; Viana, M. N. (Inst. Energ. At., Sao Paulo, Brazil). 80-58-0 is the cas registry number of certain chemical which is used as reagents here. Report, IEA-394, 4 pp. Avail. INIS From: INIS Atomindex 1977, 8(4), Abstr. No. 289171 (Portuguese) 1975. DOCUMENT TYPE: Report CA Section: 23 (Aliphatic Compounds) 82BrCHEtCO2H was prepd. in 85% yield by isotope exchange; optimum conditions were detd. .