Reference

Extraction of lanthanides with 8-quinolinol in the presence of 6-amino-4,4'-(5-nonyl)-2,2'-bipyridine

Extraction of lanthanides with 8-quinolinol in the presence of 6-amino-4,4'-(5-nonyl)-2,2'-bipyridine. Taguchi, S.; Hojjatie, M.; Freiser, H. (Dep. Chem., Univ. Arizona, Tucson, AZ 85721, USA). Anal. Chim. Acta, 197, 333-7 (English) 1987. CODEN: ACACAM. ISSN: 0003-2670. DOCUMENT TYPE: Journal CA Section: 68 (Phase Equilibriums, Chemical Equilibriums, and Solutions) 6-Amino-4,4'-(5-nonyl)-2,2'-bipyridine (ADNBP) was studied for adduct formation in combination with 8-quinolinol (HQ) for lanthanide extns. Yb, Pr and La were extd. as mixed complexes, LnQ3.ADNBP. 8-Quinolinol did not form self-adducts in these systems under the given conditions. Extractabilities are enhanced dramatically by ADNBP.

Study of the conditions for the coulometric titration of compounds which are brominated rapidly and slowly

Study of the conditions for the coulometric titration of compounds which are brominated rapidly and slowly. Chazova, L. A.; Lopatin, B. A.; Loshkarev, G. L.; Rubanova, E. V. (Kuban. Gos. Univ., Krasnodar, USSR). Fiz.-Khim. Metody Anal. Kontrolya Proizvod., Mezhvuz. Sb., 2, 33-6 (Russian) 1976. CODEN: FKMSD6. DOCUMENT TYPE: Journal CA Section: 80 (Organic Analytical Chemistry) The optimum conditions were studied for detg. 8-quinolinol and aniline by coulometric titrn. at a Pt electrode. 8-Quinolinol was titrated with Br generated from 0.2N KBr in 0.1N H2SO4 with 100% efficiency at c.d. .ltoreq.20 mA/cm2. Aniline was brominated slowly and it was detd. by back-titrn. of excess Br with Cu+ generated from 0.02M CuSO4 in 1N HCl with 100% efficiency at c.d. .ltoreq.5 mA/cm2. The relative errors were <1% and 3.2% for detg. 430-2888 .mu.g 8-quinolinol and 305 .mu.g aniline, resp.