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Extraction-photometric determination of bismuth in antimony

Journal Article · · Ind. Lab. (Engl. Transl.); (United States)
OSTI ID:5572241
The heteroligand coordination-solvated complex Bi-tetramethylenethiourea (TMTU)-I/sup -/ (Bi:TMU:I/sup -/ = 1:2:3) is 96-98% extracted by chloroform from a medium of 0.5-1.5 M sulfuric acid at concentrations of (5-8). 10/sup -3/M TMU and (6-10) x 10/sup -3/ M potassium iodide and is characterized by a rather high molar extinction coefficient (epsilon = 1.13 x 10/sup 4/) at lambda = 480 nm. In this communication they demonstrate the possibility of using this complex as an analytical form for the extraction separation and photometric determination of bismuth in the presence of antimony. It was established that in the presence of tartaric acid, the following do not interfere with the extraction of 2-50 ..mu..g bismuth: up to 2 g Sb(III), 100 mg Ni, Zn, Fe, and Cr(III); 2 mg Mo(VI) and W(VI); 1 mg Cu(II). Beer's law is fulfilled in the range of contents 2-50 ..mu..g bismuth. With an antimony sample weighing 1 g, it is possible to determine 2 x 10/sup -4/% bismuth.
Research Organization:
A. V. Bogatskii Physicochemical Institute, Odessa, USSR
OSTI ID:
5572241
Journal Information:
Ind. Lab. (Engl. Transl.); (United States), Journal Name: Ind. Lab. (Engl. Transl.); (United States) Vol. 53:1; ISSN INDLA
Country of Publication:
United States
Language:
English