摘要
采用以双硫腙为络合剂、Triton X-100为表面活性剂的新型浊点萃取体系富集淡水鱼中的痕量铅,并用火焰原子吸收光谱法对其进行测定。探讨了溶液pH、表面活性剂浓度、络合剂用量、平衡温度、平衡时间等对浊点萃取及测定灵敏度的影响,优化了实验条件。在最佳条件下测得铅的检出限为0.090μg/L,校准曲线相关系数为0.9999。该方法已用于淡水鱼中痕量铅的测定。
A new cloud point extraction-flame atomic absorption spectrometric method has been developed to determine trace lead. Dithizone was selected as the complex reagent and Triton X - 100 as the surfactant. Effects of pH, concentrations of surfactant and complex reagent, equilibrium temperature and time on the efficiency and sensitivity of cloud point extraction were investigated. Under optimal conditions, the calibration curve was linear over the concentration range of 0. 1 -60μg/L with correlation coefficient of O. 9999 and detection limit of 0. 090 μg./L. The present method was applied to the determination of trace lead in freshwater fish samples with satisfactory results.
出处
《分析试验室》
CAS
CSCD
北大核心
2012年第3期86-88,共3页
Chinese Journal of Analysis Laboratory
基金
四川省教育厅自然科学基金项目(08ZA169)资助
关键词
痕量铅
双硫腙
浊点萃取
火焰原子吸收法
Trace lead
Dithizone
Cloud point extraction
Flame atomic absorption spectrometry
