【摘要】 研究了在线氧化-流动注射-化学发光法测定痕量Cr（Ⅵ）和Cr（Ⅲ）的方法,基于槲皮素-过氧化氢-Cr（Ⅵ）-氢氧化钾化学发光直接测定Cr（Ⅵ）,Cr（Ⅲ）经二氧化铅柱在线氧化后测定。方法简单、快速,Ct（Ⅵ）检出限为1.0×10^-9g·ml^-1,Cr（Ⅵ）线性范围为1.0×10^-8～1.0×10^-6g·ml^-1,用于环境水样分析,结果满意。更多还原

【Abstract】 An on-line oxidation flow-injection chemiluminescence method for determination of Cr（ Ⅱ ） and Cr（ Ⅵ ） is established and reported in this paper. Hexavalent chromium is directly measured with Quercetin -H₂O₂-KOH chemiluminescence reaction and the determination of Cr （ Ⅱ ） is carried out after on-line oxidation of Cr（ Ⅲ ） to Cr（ Ⅵ ） with PbO2 column at 85℃. The detection limit is 1. OX10^-9g ?ml^-1 for Cr（Ⅵ ） with a linear range from 1. OX10^-81.0X10^-6g ?ml^-1. The proposed method has been applied to the analysis of Cr（ Ⅵ ） and Cr（ Ⅲ ） in environmental water samples with satisfactory results.更多还原