摘要
采用溴化十六烷基三甲铵为表面活性剂,与水杨基萤光酮形成胶束,提高水杨基萤光酮与Cr(Ⅵ)形成的有色配合物在水溶液中的溶解度。用二乙三氨五乙酸掩蔽Fe^3+、Cr^3+等干扰离子,无需分离直接测量水样中的Cr(Ⅵ)。测试结果表明,本方法标准偏差为0.246(n=10),相对标准偏差为2.56%;标准加入回收率为93.00%-110.00%,能满足环境水样中Cr(Ⅵ)的检测要求。
A method of spectrophotometric determination of trace Cr(Ⅵ)with salicyl-fluoroketone in CTMAB micelle was described.The coexist interferential ions such as Fe^3+,Cr^3+ and Co^2+ etc.were masked by diethylenetriminepentaacetic acid(DTPA),then Cr(Ⅵ)was successfully determined.The standard deviation of 0.246(n=10),relative standard deviation of 2.56%,and recovery ratio of 93.00%-110.0% were obtained.This result is satisfactory for determination trace Cr(Ⅵ)in environment water samples.
出处
《吉林大学学报(地球科学版)》
EI
CAS
CSCD
北大核心
2008年第5期869-872,共4页
Journal of Jilin University:Earth Science Edition
基金
吉林省科技厅基金项目(2005015)