本文报导了另一个新的增敏型多元惰性铬(Ⅲ)显色配合物体系。当两性增敏剂烷基二甲氨基乙酸作为<铬(Ⅲ)—铬菁R—增敏剂>体系中的增敏剂时,此显色体系的灵敏性虽比前文所报导的显色体系稍低一点,但对某些外来离子的选择性来说,自有其优点;况且当烷基为十四烷基及十六烷基时,摩尔吸光系数分别为1.22×10~5及1.14×10~5,灵敏性仍比其它已报导的体系为佳。探索了形成此多元惰性显色配合物的形成条件、组成及其在测定微量铬时的应用。 In this paper, another new sensitized multi-element chromium (Ⅲ) chromogenic complex system is reported. When the amphoteric sensitizer alkyldimethylaminoacetic acid is used as the sensitizer in system, the sensitivity of this colorimetric system is better than that of the colorimetric system Slightly lower, but for some foreign ion selectivity has its own advantages; Moreover, when the alkyl is tetradecyl and cetyl, the molar absorption coefficient of 1.22 × 10 ~ 5 and 1.14 × 10 ~ 5, the sensitivity is still better than the other reported system. The formation condition, composition and application of this multilayered inert chromogenic complex in the determination of trace chromium were explored.