| 石墨消解–原子荧光法测定土壤中的汞和砷 |
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| 引用本文： | 舒天阁,;王维,;许惠英.石墨消解–原子荧光法测定土壤中的汞和砷[J].化学分析计量,2014(2):27-29. |
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| 作者姓名： | 舒天阁 ;王维 ;许惠英 |
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| 作者单位： | [1] 宁波市镇海区环境监测站,浙江宁波315200; [2] 浙江树人大学生物与环境工程学院,杭州310015 |
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| 基金项目： | 浙江省公益性技术应用研究计划项目（2013C37098） |
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| 摘 要： | 采用石墨消解法对土壤样品进行预处理,用原子荧光光度法测定样品中汞和砷的含量。汞的质量浓度c在0.00~1.00μg/L范围内与荧光强度I线性相关,回归方程为I=849.47c–22.356,相关系数r2=0.999 9,检出限为0.001 8μg/g。砷的质量浓度在0.00~10.00μg/L范围内与荧光强度线性相关,回归方程为I=107.22c–28.994,相关系数r2=0.999 9,检出限为0.009 9μg/g。实际土壤样品5次平行测定汞和砷的相对标准偏差分别为6.2%~15.2%,0.8%~9.9%,用本法对黄土标准样品进行测定,测定结果在标准值允许范围内。
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| 关 键 词： | 石墨消解 原子荧光光度法 汞 砷 |
Determination of Mercury and Arsenic in Soil by Graphite Digestion--Atomic Fluorescence Spectrometry |
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| Institution: | Shu Tiange, Wang Wei, Xu Huiying ( 1. Ningbo City Zhenhai Environmental Monitoring Station, Ningbo 315200, China; 2. College of Biology ＆ Environment Engineering, Zhejiang Shuren University, Hangzhou 310015, China ) |
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| Abstract: | After the sample being pretreatmented with graphite digestion, mercury and arsenic in soil samples were determined by atomic fluorescence spectrophotometry. Mercury showed a linear dependence on fluorescence intensity in the range of 0.00-1.00μg/L. The regression equation of working curve was I=849.47c-22.356, and the correlation coefficient （r2） was 0.999 9. The method detection limit was 0.001 8 μg/g for mercury. Arsenic showed a linear dependence on fluorescence intensity in the range of 0.00-10.00μg/L. The regression equation of working curve was I=107.22c-28.994, and the correlation coefficient （r2） was 0.999 9. The method detection limit was 0.009 9μg/g for arsenic. RSDs of mercury and arsenic in soil samples were 6.2%-15.2%,0.8%-9.9%, respectively. The detection results of soil standard merterial agreed well with the standard value. |
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| Keywords: | graphite digestion atomic fluorescence spectrometry mercury arsenic |
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