| 高氯酸湿消化-原子荧光光度法测定饲料中总砷的不确定度评定 |
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| 引用本文： | 李应东,刘耀敏,张凤枰.高氯酸湿消化-原子荧光光度法测定饲料中总砷的不确定度评定[J].中国粮油学报,2011,26(2):115-119. |
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| 作者姓名： | 李应东 刘耀敏 张凤枰 |
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| 作者单位： | 1. 通威股份有限公司,成都,610041
2. 通威股份有限公司,成都,610041;中国科学院西北高原生物研究所,西宁,810001;中国科学院研究生院,北京,100049 |
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| 摘 要： | 对高氯酸湿消化法处理饲料样品后用原子荧光光度法测定总砷含量的测量不确定度进行了评定。通过建立测量过程中各分量的数学模型,分析、识别了不确定度来源,其测量不确定度来源于样品测试液总体积、样品称量、样品重复测定、回收率、标准物质、标准曲线等因素,估算出各不确定度分量对测量不确定度的影响,在对各不确定度分量进行量化的基础上,合成得到了测量结果的相对标准不确定度。结果表明,样品重复测定和回收率,是影响该方法不确定度的主要因素,从而为采用该方法测定饲料中总砷含量的质量控制提供了理论依据。
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| 关 键 词： | 测量不确定度评定 高氯酸湿消化 原子荧光光度法 总砷 饲料 |
Uncertainty Evaluation of Determination of Total Arsenic in Feeds by Atomic Fluorescence Spectrometry after Perchloric Acid Wet Digestion |
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| Li Yingdong,Liu Yaomin,Zhang Fengping.Uncertainty Evaluation of Determination of Total Arsenic in Feeds by Atomic Fluorescence Spectrometry after Perchloric Acid Wet Digestion[J].Journal of the Chinese Cereals and Oils Association,2011,26(2):115-119. |
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| Authors: | Li Yingdong Liu Yaomin Zhang Fengping |
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| Affiliation: | Li Yingdong1 Liu Yaomin1 Zhang Fengping1,2,3(Tongwei Co.,Ltd1.,Chengdu 610041) (Northwest Plateau Institute of Biology,Chinese Academy of Sciences2,Xining 810001) (Graduate University of the Chinese Academy of Sciences3,Beijing 100049) |
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| Abstract: | To evaluate the measurement uncertainty for determination of total arsenic in feeds by hydride generation-atomic fluorescence spectrometry after perchloric acid wet digestion treatment,the mathematical model of each component in the process of measurement was established.The main sources of uncertainty were analyzed and identified.The sources of uncertainty in the measurement process were the total volume of samples test liquid,sample weighing,repetitive test of samples,spike recovery,reference materials an... |
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| Keywords: | measurement uncertainty evaluation perchloric acid wet digestio atomic fluorescence spectrometry total arsenic feeds |
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