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碱提取-丙基化衍生法同时测定土壤中的甲基汞和乙基汞
Determination of Methylmercury and Ethylmercury in Soils with Alkali Extraction-Allylicderivatization Method
投稿时间:2017-10-20  修订日期:2017-11-24
DOI:10.19316/j.issn.1002-6002.2019.01.16
中文关键词:  甲基汞  乙基汞  土壤  碱提取  丙基化衍生
英文关键词:methylmercury  ethylmercury  soil  alkali extraction  allylicderivatization
基金项目:环保公益性行业科研专项(201309050)
作者单位
鲁立 贵阳市环境监测中心站, 贵州 贵阳 550002 
于建钊 中国环境监测总站, 国家环境保护环境监测质量控制重点实验室, 北京 100012 
解鑫 中国环境监测总站, 国家环境保护环境监测质量控制重点实验室, 北京 100012 
许秀艳* 中国环境监测总站, 国家环境保护环境监测质量控制重点实验室, 北京 100012 
通讯作者:许秀艳*  中国环境监测总站, 国家环境保护环境监测质量控制重点实验室, 北京 100012  
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中文摘要:
      建立了碱提取-丙基化衍生方式同时测定土壤中甲基汞和乙基汞的方法。优化了仪器分析条件,研究了碱提取温度、提取时间、缓冲溶液加入量和衍生化试剂加入量对测定结果的影响。应用本方法对5种实际土壤样品进行测定,甲基汞和乙基汞的方法检出限分别为0.5 μg/kg和0.3 μg/kg,相对标准偏差分别为1.3%~17%和0.94%~16%,平均回收率分别为88.2%~110%和66.1%~110%。该法适用于批量土壤样品中甲基汞和乙基汞的分析测定。
英文摘要:
      An alkali extraction-allylicderivatization method for the determination of trace levels of methylmercury and ethylmercury in soils was established in this paper. The instrumental analysis parameters were optimized. The effects of alkali extraction temperature and time, the amounts of buffer solution and derivatization reagent on the determination results were also studied. The method was applied to analyze five soil samples. The detection limits of methylmercury and ethylmercury in soils were 0.5 μg/kg and 0.3 μg/kg, respectively. And concentrations of methylmercury were determined with spiked recoveries of 88.2%-110% and relative standard deviations of 1.3%-17% (n=8), while concentrations of ethylmercury were determined with spiked recoveries of 66.1%-110% and relative standard deviations of 0.94%-16% (n=8). The proposed method has high sensitivity and is easy to operate. It's suitable for determination of methylmercury and ethylmercury in large-quantity soil samples.
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