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地质样品中微量铊的分析,常采用有机试剂萃取分离后,进行比色法测定,其分析手续较繁、灵敏度低。近年来,随着原子吸收分析技术的发展,使用石墨炉原子吸收法测定痕量铊已有报导,也有用钒作为基体改进剂测定矿石中痕量镓、铟、铊。本文提出在盐酸-碘化钾-抗坏血酸介质中,用甲基异丁基甲酮(MJBK)萃取铊,不加基体改进剂,直接用自制的简易石墨炉平台测定有机相中的铊。
Geological samples of trace thallium analysis, often using organic reagent extraction and separation, the colorimetric determination, the analysis of complex procedures, low sensitivity. In recent years, with the development of atomic absorption spectrometry, graphite furnace atomic absorption spectrometry for the determination of trace amounts of thallium has been reported. Vanadium is also used as a matrix modifier for the determination of trace amounts of gallium, indium and thallium in ores. In this paper, thallium was extracted with methyl isobutyl ketone (MJBK) in a hydrochloric acid-potassium iodide-ascorbic acid medium without using a matrix modifier, and the thallium in the organic phase was determined directly by a homemade simple graphite furnace platform.