摘要
研究了在pH 5.5的弱酸性介质中,利用镍(Ⅱ)阻抑邻菲啰啉活化铜(Ⅱ)催化过氧化氢氧化邻氨基酚的指示反应,用萃取手段控制反应时间,建立了萃取阻抑动力学光度法测定镍的新方法.方法的线性范围为1.0～80μg/L;检测限为9.1×10^(-7)g/L.用于环境水样、铝合金和人发中镍的测定,结果满意.对反应机理亦进行了探讨.
A new extraction inhibition kinetic spectrophotometric method for the determination of tracenickel was studied. The method is based on the inhibition effect of nickel (Ⅱ) on the copper(Ⅱ)catalyzed oxidation of o-aminophenol by hydrogen peroxide in the presence of 1,10-phenanthroline as an activator in weak acidic medium. The reaction time was controlled by extraction method. The linear rangeof the method was 1.0～80μg/L. The detection limit was 9.1×10～7 g/L. The method has been appliedto the determination of nickel in environmental water, aluminum alloy and human hair samples with satisfactory results. The reaction mechanism has been discussed.
出处
《分析化学》
SCIE
EI
CAS
CSCD
北大核心
1999年第7期821-824,共4页
Chinese Journal of Analytical Chemistry
基金
煤炭青年科学基金资助课题
关键词
阻抑
动力学光度法
萃取
镍
邻氨基酚
测定
Inhibition kinetic spectrophotometry, extraction, nickel, o-aminophenol
