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碘绿(Iodine green,学名碘化七甲基蔷薇苯胺,Heptametyl rosanilne iodide)在被用于测定金(Ⅲ)时曾提到铊(Ⅲ)有干扰.本文研究了铊(Ⅲ)的氯络阴离子与碘绿缔合物的形成及萃取条件,测定了络合物在苯溶液中的组成、不稳定常数和摩尔吸光系数,并应用于分析矿石中0.0001%以上的铊,效果较好.一、试剂和仪器碘绿(GTG分装):0.1%溶液,过滤使用;标准铊(Ⅲ)溶液:称取TINO_30.1300g溶解于少量硝酸中,用水移入200ml容量瓶内,并冲至刻度,此贮备溶液1ml含500μg Tl(I),取上述溶液10.00ml和1:1的混酸(硝酸:盐酸
Iodine green (Iodine green, Heptametyl rosanilne iodide) has been reported to interfere with thallium (III) when used in the determination of gold (III). In this paper, the effects of thallium (III) With the formation of iodine green association and extraction conditions, the composition of complex in benzene solution, the instability constant and molar absorption coefficient were determined, and applied to the analysis of ores more than 0.0001% thallium, the effect is better. Reagents and Instruments Iodine Green (GTG dispensing): 0.1% solution, filtered using standard thallium (III) solution: Weigh TINO_30.1300g dissolved in a small amount of nitric acid, water into the 200ml volumetric flask and rushed to the mark, this reserve Solution 1ml containing 500μg Tl (I), take the above solution 10.00ml and 1: 1 mixed acid (nitric acid: hydrochloric acid