摘要
研究了在磷酸介质中，Ｍｎ（Ⅱ）和吐温２０协同作用下，二安替比林邻溴苯基甲烷（ＤＡｏＢＭ）和Ｃｒ（Ⅵ）生成橙色产物，λｍａｘ＝４８０ｎｍ，ε＝９．１９×１０５Ｌ·ｍｏｌ－１·ｃｍ－１，Ｃｒ（Ⅵ）含量在每５０ｍＬ０～３．０μｇ内符合比尔定律。结合离子交换分离，方法用于环境水样中Ｃｒ（Ⅲ）及Ｃｒ（Ⅵ）的分析，结果满意。
A highly sensitive spectrophotometric method was developed for the determination of Cr(Ⅵ) with diantipyryl ( o bromo) phenylmethane(DAoBM) in the presence of Tween 20 and Mn(Ⅱ).Cr(Ⅵ) reacts with DAOBM to form an orange product in phosphoric acid medium.Maximum absorbance of the product is at 480nm with molar absorptivity of 9.19×10 5L·mol -1 ·cm -1 .Beer's law is obeyed in the range of 0～3 0μg/mL.This method has been applied to the determination of Cr(Ⅲ) and Cr(Ⅵ) in environmental water and the result is satisfactory.
出处
《分析试验室》
CAS
CSCD
1997年第6期15-17,共3页
Chinese Journal of Analysis Laboratory
基金
云南省教委自然科学基金
关键词
DAoBM
光度法
铬
环境水样
形态分析
水样
Spectrophotometry
diantipyryl ( o bromo) phenylmethane
chromium(Ⅲ)
chromium(Ⅵ)
ion exchange separation.
