摘要
本文研究了镍(Ⅱ)与铬天青B、喹啉和溴化十六烷基三甲基铵在PH10.0～11.5间生成的绿色四元配合物。其最大吸收波长在638nm处,摩尔吸光系数为1.35×10~5L·mol^(-1)·cm^(-1)。镍量在0～8μg/25ml内符合比耳定律。四元配合物的摩尔比是Ni:CAB:喹啉:CTMAB=1∶2∶2∶4。还研究了共存离子的影响及其消除。方法应用于矿石中镍的测定,得到满意的结果。
A green quaternary complex of nickel with chromazurol B (CAB), quinoline and cetyltrimethylammonium bromide (CTMAB) is formed in the pH range of 10.0—11.5. Its maximum absorption is at 638nm, and molar absorptivity is 1.35×10~5 L·mol^(-1)·cm^(-1). Beer's law is obeyed for 0—8μg Ni/25ml. The molar ratio of Ni to CAB, quinoline and CTMAB is 1∶2∶2∶4. The influence of foreign ions and their elimination have also been studied. The method has been applied to the determination of Ni in ores with satisfactory results.
出处
《分析化学》
SCIE
EI
CAS
CSCD
北大核心
1989年第8期734-736,共3页
Chinese Journal of Analytical Chemistry
关键词
镍
铬天青B
喹啉
CTMAB
显色反应
Nickel
Chromazuiol B
Quinoline
Cetyltrimethylammonium bromide
