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、4.39μg/kg,k=2。
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 and4.39 μg/kg(k=2)respectively.
作者
谭秀慧
杨洪生
任娣
陈风蔚
刘畅
李佳佳
TAN Xiu-hui;YANG Hong-sheng;REN Di;CHEN Feng-wei;LIU Chang;LI Jia-jia(Aquatic Products Analysis and Testing Center of Jiangsu Province,Nanjing 210017,Jiangsu,China;Freshwater Fishery Research Institute of Jiangsu Province,Nanjing 210017,Jiangsu,China;Fishery Products Quality Supervision and Testing Center(Nanjing),Ministry of Agriculture and Rural Affairs of the People's Republic of China,Nanjing 210017,Jiangsu,China)
出处
《食品研究与开发》
CAS
北大核心
2020年第7期182-187,共6页
Food Research and Development
基金
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)。
关键词
不确定度
铅
石墨炉原子吸收光谱法
电感耦合等离子体质谱法
水产品
uncertainty
lead
graphite furnace atomic absorption spectrometry(GFAAS)
inductively coupled plasma mass spectrometry(ICP-MS)
aquatic products
