摘要
研究了Ni2+与二甲酚橙及溴化十六烷基三甲铵形成三元络合物的反应特性，测定了反应级数和表观活化能．基于该络合反应速率较小的特性，采用对数外推法计算机处理数据，建立了停流－动力学测定Ni2+的新方法．大多数元素的干扰均可用动力学方法消除，应用于镍矿等实样中镍的测定，结果满意，其相对标准偏差小于3％。
The characteristics of ternary complex formation reaction of nickel ion with xylenol orange and cetyltrimethylammonium bromide have been investigated. The reaction order and apparent activation energy have been determined. Because the reaction rate of this ternary complex is relatively small, a logarithmic extrapolation method with computer calcu- lation is used. The interference of many foreign ions can be eliminated by the kinetic method. The proposed method has been applied to the determination of nickel in ore samples with satisfactory results. The relative standard deviation is <3%.
出处
《分析化学》
SCIE
EI
CAS
CSCD
北大核心
1997年第2期157-160,共4页
Chinese Journal of Analytical Chemistry
关键词
动力学光度法
二甲酚橙
镍
Ternary complex, stop-flow kinetic analysis, xylenol orange, nickel
