摘要
在pH10—11介质中,镍与铬天青S、喹啉和CTMAB反应,形成绿色的四元配合物,配合物最大吸收波长为640nm,摩尔吸光系数为1.48×10~5L·mol^(-1)·cm^(-1),其组成比为:Ni(Ⅱ):CAS:喹啉:CTMAB=1:2:2:4。Ni量在0—10μg/25ml范围符合比尔定律。考察了共存离子的影响。方法用于矿物岩石中痕量镍的测定,结果满意。
A sensitive colour reaction of Ni with chromazurol S, quinoline and CTMAB has been studied in the pH range of 10-11. The maxium absorption of the complex is at 640 nm and molar absorptivity is 1.48×105L·mol-1·cm-1·Beer's law is obeyed in the range of 0-10μg/25 ml Ni. The composition ratio of Ni to CAS, quiuoline and CTMAB is 1:2:2:4.Interferences from foreign ions and their elimination have also been studied. The method has been applied to the determination of trace Ni in ores with satisfactory results.
出处
《岩矿测试》
CAS
CSCD
北大核心
1989年第3期185-188,共4页
Rock and Mineral Analysis
