Triton X-100存在下镉试剂分光光度法测定痕量铊(III)

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.

Spectrophotometric determination of trace amounts of thallium with cadion in the presence of 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.