Hasebe K, Taga M
Department of Chemistry, Faculty of Science, Hokkaido University, Sapporo 060, Japan.
Talanta. 1982 Dec;29(12):1135-7. doi: 10.1016/0039-9140(82)80233-6.
A solvent extraction-spectrophotometric method has been developed for determination of bismuth in the form of tetra-n-butylammonium tetraiodobismuthate(III). The effects of pH, the concentrations of tetra-n-butylammonium and iodide ions, and the nature and amount of the organic, solvent have been studied. Tetra-n-butylammonium was found to be the most useful cation for extraction of tetraiodobismuthate with chloroform, giving quantitative extraction. The optimum pH is <3, and the extracted species is stable for at least a day at room temperature. Bismuth can be determined at the 10(-5)M level in aqueous solution, the relative standard deviation being 1.7%.
已开发出一种溶剂萃取-分光光度法，用于测定四碘合铋(III)酸四正丁铵形式的铋。研究了pH值、四正丁铵和碘离子浓度以及有机溶剂的性质和用量的影响。发现四正丁铵是用氯仿萃取四碘合铋酸盐最有效的阳离子，可实现定量萃取。最佳pH值<3，萃取的物质在室温下至少稳定一天。铋在水溶液中的测定下限为10(-5)M，相对标准偏差为1.7%。
