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两年前,我们在研究“铟的萃取色层分离及其在测定矿石中微量铟的应用试验中发现,在氢溴酸-磷酸三丁酯(TBP)体系中,铊、金和铟一起被萃取在固定相上。用水洗脱铟后,铊和金仍留在固定相上。在此试验结果的启发下,我们继续进行了铊的萃取色层分离及其在测定矿石中微量铊的应用。本文仍用TBP-0.8MHBr体系萃取色层富集铊,再用抗坏血酸-柠檬酸钠-柠檬酸溶液洗脱铊,最后以结晶紫萃取比色测定铊。试验表明,本法选择性好,灵敏度高,能应用于测定复杂矿石中0.0002％以上的铊。试验中所用的固定相和色层柱都按前文的操作手续制备。铊的标准是称取光谱纯三氧化二铊用盐酸溶解配制而成。
Two years ago, when we studied "the extraction of indium by chromatography and its application in the determination of trace indium in ores, we found that in the hydrobromic acid-tributyl phosphate (TBP) system, thallium, gold and indium Extracted in the stationary phase.Used of water after the elution of indium, thallium and gold remain in the stationary phase.According to the results of this experiment, we continue the extraction of the chromatographic separation of thallium and its application in the determination of trace amounts of thallium ore In this paper, we still use the TBP-0.8MHBr system to extract the color layer to enrich the thallium, and then use the ascorbic acid-sodium citrate-citric acid solution to elute the thallium, and finally determine the thallium by the crystal violet extraction colorimetric assay.The results show that this method has good selectivity, High sensitivity and can be applied to the determination of thallium in more than 0.0002% of the complex ores.The stationary phase and chromatographic column used in the experiment are prepared according to the previous procedures.The standard of thallium is to weigh the pure thallium trioxide in hydrochloric acid And into.