| 李辉，颜晓娜，邓健，刘雅婷，王丽丽，李旭婷.分散液液微萃取—分光光度法测定水中痕量汞[J].南华大学学报(自然科学版),2011,25(2):79~83.[LI Hui,YAN Xiao-na,DENG Jian,LIU Ya-ting,WANG Li-li,LI Xu-ting.Determination of Trace Mercury in Waters by SpectrophotometryWith Dispersive Liquid-liquid Microextraction[J].Journal of University of South China(Science and Technology),2011,25(2):79~83.] |
| 分散液液微萃取—分光光度法测定水中痕量汞 |
| Determination of Trace Mercury in Waters by SpectrophotometryWith Dispersive Liquid-liquid Microextraction |
| 投稿时间：2011-04-07 |
| DOI： |
| 中文关键词: 分散液液微萃取 分光光度法 汞 水 |
| 英文关键词:dispersed liquid-liquid micro-extraction spectrophotometry mercury waters |
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| 中文摘要: |
| 以四氯化碳为萃取剂，丙酮为分散剂，硫代米式酮（Thio-Michlers ketone,TMK）为汞的螯合剂，建立了水中痕量汞分散液液微萃取—分光光度法测定的新方法.对分散液—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110～420 ng/mL范围内与吸光度呈良好线性关系，相关系数r=0.998 1，富集倍数为30，检出限为55 ng/mL，相对标准偏差（RSD）为4.2%（n=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，适用于水中痕量金属汞的测定. |
| 英文摘要: |
| A novel method for the determination of trace mercury in waters by dispersive liquid-liquid microextraction (DLLME) coupled with spectrophotometry has been developed.The preposed method uses thio-Michlers ketone (TMK) as a chelating agent for mercury and carbon tetrachloride as an extraction solvent,acetone as a disperser.The parameters for determination of mecury were optimized including the pH of solution,the chelating agent for mecury,the types and dosages of extraction solvent,dispersant and the extraction time.Under the optimum conditions,the calibration curves were linear in the concentration range 110～420 ng/mL for mecury with the correlation coefficient of 0.9981.The detection limit was 55 ng/mL and the relative standard deviation (RSD) 8.3% (n=8).The method was used to determine trace mercury in water samples with the recoveries in the range of 92.0%～108.0%.It exhibited a sensitive,rapid and easy-to-use method for the fast determination of trace mecury in water samples with high accuracy demonstrating its potential for practical application. |
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