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食品研究与开发:2020,41(7):182-187
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GFAAS法和ICP-MS法测定水产品中铅含量的不确定度评定
(1.江苏省水产质量检测中心,江苏南京210017;2.江苏省淡水水产研究所,江苏南京210017;3.农业农村部渔业产品质量监督检验测试中心(南京),江苏南京210017)
Uncertainty Evaluation for Determination of Lead in Aquatic Products by GFAAS and ICP-MS
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投稿时间:2019-04-26    
中文摘要: 分别采用石墨炉原子吸收法(graphite furnace atomic absorption spectrometry,GFAAS)和电感耦合等离子体质谱法(inductively coupled plasma mass spectrometry,ICP-MS)测定质控样品中铅含量,分析不确定度的主要来源,建立水产品中铅测定的不确定度评定的数学模型,分别计算两种方法的各不确定度分量,结果表明:不确定度主要来源于标准曲线拟合、测量结果的重复性、方法回收率、标准溶液配制,GFAAS法测定铅含量的扩展不确定度高于ICP-MS法,两种方法的不确定度分别为 7.70、4.39 μg/kg,k=2。
Abstract:The content of lead in quality control material was determined by graphite furnace atomic absorption spectrometry (GFAAS)and inductively coupled plasma-mass spectrometry (ICP-MS),respectively.The sources of determination uncertainty were analyzed,a mathematical model of uncertainty evaluation for the determination of lead in aquatic products by was established,and each component of uncertainty of the two analytical methods was quantified.The major uncertainty sources were from variability of calibration curve,measurement repeatability,method recovery and standard solution preparation.The expanded uncertainty of for determination of lead in aquatic products by GFAAS was higher than that of ICP-MS,which was 7.70 and 4.39 μg/kg(k=2)respectively.
文章编号:202007031     中图分类号:    文献标志码:
基金项目:中国渔业协会水产品质量安全保障标准体系建设项目;江苏省渔业科技类项目(D2017-2-4)
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