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化学学报
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化学学报 ›› 1988, Vol. 46 ›› Issue (5): 500-502. 上一篇    下一篇

研究论文

Triton X-100存在下镉试剂分光光度法测定痕量铊(III)

洪水皆;李庆喜;杨明东   

  1. 中国科学院环境化学研究所
  • 发布日期:1988-05-15

Spectrophotometric determination of trace amounts of thallium with cadion in the presence of triton X-100

HONG SHUIJIE;LI QINGXI;YANG MINGDONG   

  • Published:1988-05-15

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494

被引次数

14

本文首次提出了在Triton X-100存在下, 以镉试剂作显色剂于水相直接分光光度法测定了痕量铊, 结果表明: 该体系具有很高的灵敏度, 是目前分光光度法测定铊的最灵敏方法之一.

关键词: 分光光度法, 痕量元素, 显色剂, 镉, 铊, ＴＲＩＴＯＮ Ｘ-１００

A highly sensitive spectrophotometric method for the determination of trace amts. of thallium(III) using Cadion and Triton X-100 is described. It is the most sensitive method for the determination of thallium in aqueous solution In buffered solution (H4Cl-NH4OH) at pH 11.0 and in the presence of a nonionic surfactant, Triton X-100, thallium(III) and Cadion form a complex with the molar ratio of Tl:Cadion = 1:5. The complex exhibits an absorption max. at 470 nm with a molar absorptivity of 1.37 ?105 L mol-1 cm-1. Beer's law obeyed for 0-1.2 ppm Tl.

Key words: SPECTROPHOTOMETRY, TRACE ELEMENTS, COLOUR REAGENTS, CADMIUM, THALLIUM, TRITON X-100

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