期刊论文

中文

南华大学学报(自然科学版)

1673-0062

2011

25

2

74-78

10.19431/j.cnki.1673-0062.2011.02.017

本校为第一机构

以四氯化碳为萃取剂，丙酮为分散剂，硫代米式酮（Thio．Michler，Sketone，TMK）为汞的螯合剂，建立了水中痕量汞分散液液微萃取一分光光度法测定的新方法．对分散液一液微萃取条件和分光光度法测定的最佳实验参数进行优化，包括溶液的pH值，萃取剂与分散剂的种类与用量，螯合剂硫代米式酮的用量，萃取时间等．在最佳实验条件下，汞的浓度在110～420ng／mL范围内与吸光度呈良好线性关系，相关系数r=0．9981，富集倍数为30，检出限为55ng／mL，相对标准偏差（RSD）为4．2％（／7,=8），回收率为92％～108％．实验结果表明，该方法简便，快速，回收率高，成本低、富集效率高且对环境友好，适用于...

A novel method for the determination of trace mercury in waters by dispersive liquid-liquid microextraction （DLLME） coupled with spectrophotometry has been devel- oped. The preposed method uses thio-Michler＇s ketone （TMK） as a chelating agent for mercury and carbon tetrachloride as an extraction solvent, acetone as a disperser. The pa- rameters for determination of mecury were optimized including the pH of solution, the che- lating agent for mecury, the types and dosages of extraction solvent, dispersant and the ex- traction time. Under th...