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文摘
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使用浓HNO_3+HF混合液和浓HNO3液分别在高压密闭罐中消解土壤、沉积物、岩石和植物样品,6 mol/L HCL加热还原样品后用氢化物发生-原子荧光光谱法(HG-AFS)测定样品中的硒.使用该法对土壤标准参考物质GSS-4、GSS-5、GSS-6、GSS-7和植物标准GSV-1、GSV-3进行了分析,硒的测定结果与推荐值一致.加标回收实验的回收率在98.0%～101.4%,平均为99.8%.实测样品中的硒与中子活化分析(NAA)和氢化物-多接受杯质谱计(HG-MC-ICP- MS)的分析结果基本一致,表明该法平行样的重现性好,分析速度快,提高了硒分析的准确度和分析精度. |
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其他语种文摘
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The analytical method for rapidly determining total selenium in environmental samples has been established.Soil,sediment,rock and plant samples were digested with concentrated HNO_3 +HF or HNO_3 in screw top PTFE-lined stainless steel bombs at 155 ℃ for 16 hours or 6 hours,the solution was evaporated till dryness and then dissolved with 6 mol/L HCL at 100 ℃ for 45 minutes.Selenium was determined by HG-AFS.Six standard reference materials of soil and plant(GSS-4,-5,-6,-7 and GSV-1,-3) were studied.The results are consistent with the reference values.The recovery of selenium in spiked certified reference materials ranged from 98.0%—101.4% with an average of 99.8%.Selenium in real duplicate samples was also determined,whose results coincide with those by NAA and HG-MC-ICP-MS.This method has the advantages of time saving,and high accuracy and precision for analyzing total Se in environmental samples. |
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来源
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矿物学报
,2008,28(2):187-190 【核心库】
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关键词
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硒
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环境样品
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快速分析
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氢化物-原子荧光法
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地址
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中国科学院,地球化学研究所, 环境地球化学国家重点实验室, 贵州, 贵阳, 550002
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1000-4734 |
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学科
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化学;地质学 |
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基金
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国家自然科学基金
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国家教育部留学回国人员科研启动基金
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文献收藏号
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CSCD:3266931
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