碘化物萃取原子吸收分光光度法连续测定矿石中的锑和铋

Simultaneous Determination of Antimony and Bismuth in Minerals by Atomic-absorption spectrophotometry

矿石中的锑、铋通常是利用其与碘离子分别生成黄绿色的碘化锑络阴离子SbI_(4)^(-)、黄色的碘化铋络阴离子BiI_(4)^(-)而进行比色测定。由于锑、铋在分析化学性质上的差异,试样的分解方法,显色条件亦有所不同,故往往是分别取样测定。

A method based on the solvent extraction of antimony and bismuth iodides with methyl isobutyl ketone(MIBK)followed by a.a.s.determination has been studied.45 common elements do not interfere.The results are in good agrement with those obtained by the photometric method with thiourea for antimony and by extraction spectrophotometric method with potassium iodide,for bismuth.