Desai G S, Shinde V M
Analytical Laboratory, The Institute of Science, 15 Madam Cama Road, Bombay 400 032, India.
Talanta. 1992 Apr;39(4):405-8. doi: 10.1016/0039-9140(92)80155-7.
A method is proposed for the extraction of microgram levels of tellurium(IV) from halide media with tris-(2-ethyl hexyl) phosphate dissolved in toluene as extractant. The optimum conditions have been evaluated from a critical study of acid concentration, extractant concentration, period of equilibration and effect of solvent. Tellurium ion from the organic phase is stripped with water and determined spectrophotometrically with stannous chloride. The method affords binary separation of tellurium from copper, bismuth, gold and selenium and is applicable to the analysis of alloy samples and synthetic mixtures. The method is fast, accurate and precise.
提出了一种从卤化物介质中萃取微克级碲（IV）的方法，该方法使用溶解在甲苯中的磷酸三（2-乙基己基）酯作为萃取剂。通过对酸浓度、萃取剂浓度、平衡时间和溶剂效应的关键研究评估了最佳条件。用去离子水反萃取有机相中的碲离子，并用氯化亚锡进行分光光度法测定。该方法可实现碲与铜、铋、金和硒的二元分离，适用于合金样品和合成混合物的分析。该方法快速、准确且精密。
