| ICP-AES测定紫薯中6种矿质元素不确定度评定 |
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| 引用本文： | 周娅,杨定清,谢永红.ICP-AES测定紫薯中6种矿质元素不确定度评定[J].西南农业学报,2012,25(2):620-624. |
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| 作者姓名： | 周娅 杨定清 谢永红 |
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| 作者单位： | 四川省农业科学院分析测试中心,四川成都,610066 |
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| 基金项目： | 四川省分析测试共享服务平台建设—薯类理化标准与快速检测技术标准研究 |
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| 摘 要： | 通过分析等离子体原子发射光谱(ICP-AES)法测定紫薯中Cu、Fe、Mn、Zn、Ca、Mg等6种矿质元素的过程,建立相应的数学模型。对数学模型中各个参数进行不确定度来源分析,分别对A类不确定度(由测量的结果统计分布计算的不确定度)或B类不确定度(基于经验或其他信息的概率分布估计的不确定度)进行评定。按照国际通用方法对各不确定度分量合成和扩展,得到该方法的不确定度评定。结果表明:标准溶液的配制、标准曲线拟合线性方程及重复性测量是不确定度的主要来源。
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| 关 键 词： | 等离子体原子发射光谱法 紫薯 矿质元素 不确定度 |
Evaluation of Uncertainty in Determination of 6 Mineral Elements in Purple Sweet Potato by ICP-AES |
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| ZHOU Ya
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YANG Ding-qing
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XIE Yong-hong.Evaluation of Uncertainty in Determination of 6 Mineral Elements in Purple Sweet Potato by ICP-AES[J].Southwest China Journal of Agricultural Sciences,2012,25(2):620-624. |
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| Authors: | ZHOU Ya YANG Ding-qing XIE Yong-hong |
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| Institution: | (Testing Center of Sichuan Academy of Agricultural Sciences,Sichuan Chengdu 610066,China) |
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| Abstract: | A mathematic model for evaluating the uncertainty of the determination procedure for 6 mineral elements(Cu,Fe,Mn,Zn,Ca,Mg) in purple sweet potato by inductively coupled plasma-atomic emission spectrometer(ICP-AES)was established.The uncertainty sources for each of the parameters in the model were analyzed.The uncertainties of type A(based on the calculation of the statistical distribution of the determination results)or type B(based on the estimation by experience and the probability distribution of other information)were evaluated.According to the international general method,the component uncertainties were synthesized and extended,respectively to obtain the uncertainty evaluation.The results showed that the preparation of standard solution,the fitted linear regression equation for the calibration curve and the measurement repeatability were the main sources of uncertainties. |
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| Keywords: | ICP-AES Purple sweet potato Mineral element Uncertainty |
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