原子吸收光谱法检测含乳饮料中铜的不确定度评定

目的对原子吸收光谱法检测含乳饮料中铜元素含量的不确定度进行评定。方法从测量重复性、校准曲线等方面分析该方法的不确定度来源,依据GB/T 5009.13-2003《食品中铜的测定》建立数学模型,根据JJF 1059.1-2012《测量不确定度的评定与表示》对测量结果的各不确定度来源进行分析和量化。结果当含乳饮料中铜含量为0.29 mg/L时,其扩展不确定度为0.022 mg/L（k=2）。不确定度主要来源于试样测定时标准曲线使用玻璃量具的引入,其次是测量重复性引入的不确定度。结论本研究可为原子吸收法测定含乳饮料中铜含量的测量准确性提供参考。...

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Bibliographic Details
Published in食品安全质量检测学报 Vol. 8; no. 1; pp. 286 - 289
Main Author 李海星 段亚军 马海军 赵军妮 康海龙
Format Journal Article
LanguageChinese
Published 蒙牛乳业(宝鸡)有限公司,宝鸡,721013 2017
Subjects
不确定度
原子吸收法
含乳饮料
铜
atomic absorption method
不确定度
copper
铜
原子吸收法
uncertainty
含乳饮料
milk beverage
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ISSN2095-0381

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Summary:目的对原子吸收光谱法检测含乳饮料中铜元素含量的不确定度进行评定。方法从测量重复性、校准曲线等方面分析该方法的不确定度来源,依据GB/T 5009.13-2003《食品中铜的测定》建立数学模型,根据JJF 1059.1-2012《测量不确定度的评定与表示》对测量结果的各不确定度来源进行分析和量化。结果当含乳饮料中铜含量为0.29 mg/L时,其扩展不确定度为0.022 mg/L（k=2）。不确定度主要来源于试样测定时标准曲线使用玻璃量具的引入,其次是测量重复性引入的不确定度。结论本研究可为原子吸收法测定含乳饮料中铜含量的测量准确性提供参考。
Bibliography:Objective To evaluate the uncertainty for determination of copper content in milk beverage by atomic absorption spectrometry. Methods From the measurement repeatability and the standard curve analysis, the uncertainty sources of the method was analyzed. According to GB/T 5009.13-2003 Determination of copper in the food, the mathematical model was established. According to JJF 1059.1-2012 Evaluation and expression of measurement uncertainty, the uncertainty sources of the measured results were analyzed and quantified. Results when the copper content in milk beverage was 0.29 mg/L, the expanded uncertainty was 0.022 mg/L（k=2）. The uncertainty mainly came from standard curve introduced by the using of measuring glass, followed by the uncertainty of measurement repeatability. Conclusion This paper can provide reference for measurement accuracy of copper content in milk beverage by atomic absorption spectrometry.
copper; atomic absorption method; milk beverage; uncertainty
11-5956/TS
LI Hai-Xing,DUAN Ya-Jun,MA Hai-Ju
ISSN:2095-0381