| ICP-AES法测定土壤中铬含量的不确定度评定 |
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| 引用本文： | 周娅,杨定清,谢永红,王棚.ICP-AES法测定土壤中铬含量的不确定度评定[J].四川环境,2012,31(2):33-35. |
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| 作者姓名： | 周娅 杨定清 谢永红 王棚 |
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| 作者单位： | 四川省农科院分析测试中心,成都,610066 |
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| 摘 要： | 根据等离子体原子发射光谱(ICP-AES)法测定土壤中铬的过程,建立相应的数学模型并对模型中各个参数进行了不确定度来源分析。结果表明,测定结果的不确定性主要来源于标准曲线的浓度与光谱强度拟合直线方程求铬含量的不确定度、标准溶液和配置标准工作溶液时的不确定度,其次为重复性不确定度;定容体积和样品称量过程的不确定度对测量结果的不确定度贡献相对较小。
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| 关 键 词： | 等离子体原子发射光谱法 土壤 铬 不确定度 |
Evaluation of Uncertainty of Determination of Chromium Content in Soft by ICP-AES |
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| ZHOU Ya,YANG Ding-qing,XIE Yong-hong,WANG Peng.Evaluation of Uncertainty of Determination of Chromium Content in Soft by ICP-AES[J].Sichuan Environment,2012,31(2):33-35. |
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| Authors: | ZHOU Ya YANG Ding-qing XIE Yong-hong WANG Peng |
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| Institution: | ( Testing Center of Sichuan Academy of Agricultural Sciences, Chengdu 610066, China) |
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| Abstract: | According to the process of determination of Chromium in soil using plasma-atomic emission spectrum （ICP-AES）, a mathematic model was established and the uncertainty source of every model parameter was analyzed. The results showed that the uncertainties sourced mainly from the calculated Chromium content by regression equation of concentration versus specu＇, al intensity and preparation of standard liquid; secondly from the uncertainty of repeatability. The uncertainties from the determination processes for volume and weight contributed little to the overall uncertainty. |
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| Keywords: | ICP-AES soil chromium uncertainty |
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