摘要
研究了偶氮胂Ⅲ与Ｃｒ２Ｏ７２－的褪色反应，建立了一种新的光度法测定痕量Ｃｒ（Ⅵ）方法。发现其在硝酸介质中具有高灵敏的褪色反应，摩尔吸光系数达３．８×１０６，Ｃｒ（Ⅵ）量在０～０．８μｇ／２５ｍＬ范围内符合比耳定律。
The fading reaction of arsenazo III with Cr 2O 7 2-
was studied, and a new spectrophotometric method for determining trace Cr(Ⅵ) was developed. In
the medium of nitric acid, the reaction has high sensitivity. The molar absorptivity is 3.8×10
6L·mol -1 ·cm -1 , and Beer's law is obeyed for Cr(VI) in the range of 0-0.8μg/25mL.
出处
《分析试验室》
CAS
CSCD
1999年第2期44-46,共3页
Chinese Journal of Analysis Laboratory
关键词
光度法
褪色反应
铬
测定
偶氮胂Ⅲ
Spectrophotometry, fading reaction, chromium(VI), arsenazo Ⅲ
alloy steel
water
