| 水浴消解-原子荧光法测定土壤中的砷汞 |
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| 引用本文： | 薄维平,孔肖肖,陈士新,赵建荣.水浴消解-原子荧光法测定土壤中的砷汞[J].环境监控与预警,2016,8(3):34-37. |
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| 作者姓名： | 薄维平 孔肖肖 陈士新 赵建荣 |
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| 作者单位： | 东海县环境监测站,江苏 连云港,222300 |
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| 摘 要： | 建立了王水水浴消解-原子荧光法测定土壤中砷汞的方法,确定还原剂为硼氢化钾,测砷和汞时硼氢化钾的最优质量分数分别为2%和0.05%,载流为5%盐酸。该法砷和汞分别在质量浓度0.0~40.0μg/L和0.00~4.00μg/L范围内线性良好,相关系数均0.999 5,砷和汞的检出限分别为0.009和0.001 mg/kg,相对标准偏差分别为3.90%和2.67%,加标回收率分别为94.1%~107.6%和92.0%~104.0%。采用本法对国家标准土壤样品和东海县部分农田土壤样品进行测定分析,结果良好,表明该法操作简单、灵敏度高、实用性好,适用于土壤中砷和汞的测定。
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| 关 键 词： | 原子荧光法 土壤 砷 汞 |
| 收稿时间： | 2016/1/11 0:00:00 |
| 修稿时间： | 2016/2/14 0:00:00 |
Determination of Arsenic and Mercury in Soils using Water Bath Digestion Coupled with Atomic Fluorescence Spectrometry |
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| BO Wei ping,KONG Xiao xiao,CHEN Shi xin,ZHAO Jian rong.Determination of Arsenic and Mercury in Soils using Water Bath Digestion Coupled with Atomic Fluorescence Spectrometry[J].Environmental Monitoring and Forewarning,2016,8(3):34-37. |
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| Authors: | BO Wei ping KONG Xiao xiao CHEN Shi xin ZHAO Jian rong |
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| Abstract: | A method for determining arsenic and mercury contents in soils was established using water bath coupled with atomic fluo-rescence spectrometry. Potassium borohydride was used as the reducing agent, and the optimal mass fraction for determining arsenic and mercury was 2% and 0. 05%, respectively. 5% Hydrochloric acid was used as the carrying fluid. The linearity was good for ar-senic and mercury in the range of 0. 0~40. 0μg/L and 0. 00~4. 00 μg/L, respectively. The correlation coefficients were above 0. 999 5. The respective detection limits of arsenic and mercury were 0. 009 and 0. 001 mg/kg, and relative standard deviations ( RSDs) were 3. 90% and 2. 67%, respectively. Recoveries for arsenic were 94. 1% ~107. 6%, and 92. 0% ~104. 0% for mercu-ry. The method was used well to analyze the national standard soil samples and farmland soil samples of Donghai County. The re-sults proved that the method was simple, sensitive, practical and suitable for determining arsenic and mercury contents in soils. |
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| Keywords: | Atomic fluorescence spectrometry Soil Arsenic Mercury |
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