石墨消解-原子荧光法测定土壤中的汞和砷
舒天阁1,王维1,许惠英2
宁波市镇海区环境监测站,浙江宁波 315200;浙江树人大学生物与环境工程学院,杭州 310015
Determination of Mercury and Arsenic in Soil by Graphite Digestion-Atomic Fluorescence Spectrometry
舒天阁1,王维1,许惠英2
1. Ningbo City Zhenhai Environmental Monitoring Station, Ningbo 315200, China; 2. College of Biology & Environment Engineering, Zhejiang Shuren University, Hangzhou 310015, China
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 0.00~1.00 μg/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 8 μg/g。砷的质量浓度在 0.00~10.00 μg/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 9 μg/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。
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 0.00-1.00 μg/L. The regression equation of working curve was I=849.47c-22.356, and the correlation coefficient (r2) was 0.9999. The method detection limit was 0.0018 μg/g for mercury. Arsenic showed a linear dependence on fluorescence intensity in the range of 0.00-10.00 μg/L. The regression equation of working curve was I=107.22c-28.994, and the correlation coefficient (r2) was 0.9999. The method detection limit was 0.0099μg/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.
关键词:石墨消解;原子荧光光度法;汞;砷
Keywords:graphite digestion; atomic fluorescence spectrometry; mercury; arsenic
基金:浙江省公益性技术应用研究计划项目
本文引用格式:
舒天阁1,王维1,许惠英2.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,2014,23(2):27-29.
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