摘要
合成了二安替匹林—（２，４—二氯）苯基甲烷（ＤＡＤＣＭ）。研究了在Ｈ３ＰＯ４介质中，在Ｍｎ（Ⅱ）和吐温２０存在下，Ｃｒ（Ⅵ）与ＤＡＤＣＭ的显色反应。该反应产物为橙红色化合物，λ（ｍａｘ）＝４９０ｎｍ，ε为１．０８×１０５。Ｃｒ（Ⅵ）量在０～１０（μｇ／２５ｍｌ）符合比耳定律。方法有较好选择性，体系可稳定２４ｈ。用于水和废水中微量Ｃｒ（Ⅵ）的测定，结果满意。
The new reagent diantipyry1-2,4- dichlorphenylmethane (DADCM) was synthesized. The new method was studied for determination of micro chromjum (Ⅵ)by spectrophotometry. In the presence of manganese(Ⅱ)and Tween-20, chromium (Ⅵ) reacts with DADCM to form a orange-red product in phosphoric acid medium. Maximum absorbanc of the product is at 490nmwith molar absorptivity of 1.08×105L·mol(-1)·cm(-1).Beer's for is obeyed over the range 0-10μg Cr(Ⅵ)/25ml.The method was applied to determination of micro chromium(Ⅵ) in water with good results.
出处
《干旱环境监测》
1994年第1期25-27,共3页
Arid Environmental Monitoring
关键词
铬
DADCM
吐温20
比色法
水质监测
Diantipyry1-2
4-dichlorphenylmethane
Chromium (Ⅵ)
Water
Spectrophotmetry.
