DCB-偶氮胂高灵敏光度法测定痕量铬(Ⅵ)  

Highly Sensitive Spectrophotometric Determination of Trace Chromium(Ⅵ)with DCB-arsenazo

作　　者：陆茜[1] 蔡汝秀[2] 

机构地区：[1]华中理工大学汉口分校化工系,武汉430012 [2]武汉大学化学系,武汉430072

出　　处：《分析科学学报》2001年第2期138-140,共3页Journal of Analytical Science

摘　　要：本文研究了 DCB偶氮胂与 Cr2 O2 - 7的褪色反应。结果表明 ,在硝酸介质中褪色反应具有高的灵敏度 ,拟定了反应的最佳条件 ,建立了一种新的光度法测定痕量铬( )方法。本法检出限为 4.2 2× 1 0 - 11g/m L ,线性范围为 0～ 0 .8μg/1 0 m L ,用于测定人发中的痕量铬 ( ) 。The fading reaction of DCB arsenazo with Cr 2O 2- 7 was studied. In the medium of nitric acid, the reaction has high sensitivity. Based on these, a new spectrophotometric method for determining trace Cr(Ⅵ)was developed. The detection limit is 4.22×10 -11 g/mL and linear range is 0～0.8 μg/10 mL for chromium(Ⅵ). The method has been applied to the determination of trace Cr(Ⅵ)in human hair with satisfactory results.

关 键 词：分光光度法 DCB偶氮胂 铬(Ⅵ) 人发 测定 稀土显色剂 

分 类 号：Q581[生物学—生物化学]