摘要
本文研究了氨水介质中,痕量镍(Ⅱ)加速空气氧化二苯基偶氮酰肼褪色的新指示反应及其动力学条件,建立了动力学光度法测定痕量镍(Ⅱ)的新方法。录敏度6.6×10^(-12)g Ni^(2+)ml,测定范围由0～0.3μgNi^(2+)/25.9ml。用以测定中药内的痕量Ni^(2+)获得了满意的结果。
In a medium of ammonium hydroxide Ni (Ⅱ) accelerates the decolouring reaction resulting from the oxidation of diphenylcarbazone by air and its kinetic condition is offered. A new high-selectivity method for determining trace Ni(Ⅱ) was established. The sensitivity of the method is 6.6×10^(-12)g/ml, and the range of Ni(Ⅱ) 0—0.3μg/25.9ml. The method has been used to determine trace Ni (Ⅱ) in Chinese medicinal herbs with satisfactory results.
出处
《分析化学》
SCIE
EI
CAS
CSCD
北大核心
1989年第6期548-550,共3页
Chinese Journal of Analytical Chemistry
关键词
镍
光度法
DPZ
动力学
偶氮酰肼
Catalytic decolourization
Kinetic spectrophotometry
Diphenylcarbazone
Nickel
