| 水产品中镉两种测定方法的不确定度评定比较 |
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| 引用本文： | 谭秀慧,杨洪生,黄鸿兵,李佳佳,夏莉萍,张秋云,刘畅,朱晓华. 水产品中镉两种测定方法的不确定度评定比较[J]. 水产科学, 2021, 40(2): 218-225 |
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| 作者姓名： | 谭秀慧 杨洪生 黄鸿兵 李佳佳 夏莉萍 张秋云 刘畅 朱晓华 |
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| 作者单位： | 江苏省淡水水产研究所,江苏 南京 210017;江苏省水产质量检测中心,江苏 南京 210017;农业农村部渔业产品质量监督检验测试中心,江苏 南京 210017;江苏省淡水水产研究所,江苏 南京 210017 |
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| 基金项目： | 江苏现代农业产业技术体系建设专项(JATS〔2019〕354);江苏省重点研发计划(现代农业)项目(BE2019393). |
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| 摘 要： | 为建立和比较水产品中镉含量测定不确定度评定的方法,分别采用石墨炉原子吸收法和电感耦合等离子体质谱法测定FAPAS质控样品T07279 QC中镉的含量,分析不确定度的主要来源,建立水产品中镉测定的不确定度评定的数学模型,并计算两种方法的不确定度分量.试验结果表明,石墨炉原子吸收法不确定度主要来源于标准曲线拟合,而电感耦合...
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| 关 键 词： | 水产品 镉 不确定度 石墨炉原子吸收光谱法 电感耦合等离子体质谱法 |
Uncertainty Comparison of Two Methods for Detection of Cadmiumin Fishery Products |
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| TAN Xiuhui,YANG Hongsheng,HUANG Hongbing,LI Jiajia,XIA Liping,ZHANG Qiuyun,LIU Chang,ZHU Xiaohua. Uncertainty Comparison of Two Methods for Detection of Cadmiumin Fishery Products[J]. Fisheries Science, 2021, 40(2): 218-225 |
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| Authors: | TAN Xiuhui YANG Hongsheng HUANG Hongbing LI Jiajia XIA Liping ZHANG Qiuyun LIU Chang ZHU Xiaohua |
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| Affiliation: | (Freshwater Fishery Research Institute of Jiangsu Province,Nanjing 210017,China;Aquatic Products Analysis and Testing Center of Jiangsu Province,Nanjing 210017,China;Fishery Products Quality Supervision and Testing Center,Ministry of Agriculture and Rural Affairs,Nanjing 210017,China) |
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| Abstract: | The content of cadmium in FAPAS QC Material T07279QC was comparatively determined by both graphite furnace atomic absorption spectrometry (GFAAS) and inductively coupled plasma-mass spectrometry (ICP-MS), a mathematical model of uncertainty evaluation for detection of cadmium in fishery products was established, and each component of uncertainty of the two analytical methods was quantified to evaluate uncertainty of the two methods for the determination of cadmium in fishery products and to explore the sources of measurement uncertainty. The major uncertaintyof GFAAS method was found to be derived from variability of calibration curve, compared to standard solution preparation for ICP-MS method, with the higher expanded uncertainty in GFAAS method than that in ICP-MS method. The content of cadmium in the FAPAS QC Material T07279QC was calculated as (7.47±0.470) mg/kg by the GFAAS method and (7.53±0.376) mg/kg ( k =2) by ICP-MS method. The determination values by two methods were both in consistency with the certified value (5.76—9.33 mg/kg). |
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| Keywords: | fishery product cadmium uncertainty graphite furnace atomic absorption spectrometry(GFAAS) inductively coupled plasma mass spectrometry(ICP-MS) |
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