原子荧光光谱法测定食品添加剂中砷含量的不确定度评定  

Evaluation of uncertainty in determination of arsenic content in food additives by atomic fluorescence spectrometry

作　　者：梁震[1] 陈旻实[1] 刘伟[1] 王巍[1] 武敏建 赖佳佳 LIANG Zhen CHEN Min - shi LIU Wei Wang Wei WU Min - jian LAI Jia - jia(Technical Centre of Fujian Entry- Exit Inspection and Quarantine Bureau,State key Laboratory of safety testing of consumer products, Fujian Key Laboratory Technology Research of Inspection and Quarantine, Fuzhou Fujian 350001)

机构地区：[1]福建出入境检验检疫局技术中心,国家消费品安全检测重点实验室,福建省检验检疫技术研究重点实验室,福建福州350001

出　　处：《粮油食品科技》2016年第6期71-75,共5页Science and Technology of Cereals,Oils and Foods

基　　金：国家质检总局科技计划项目(2015IK028)

摘　　要：依照国家强制性食品安全标准GB 5009.76—2014《食品安全国家标准食品添加剂中砷的测定》,选取食品添加剂泡打粉为样品,从标准溶液溯源,建立测定食品添加剂中砷含量的数学模型。对检测过程中引入的不确定度进行了分类和量化,对各个不确定度分量进行了系统全面评定和计算,计算出相应的合成不确定度,给出了测量结果在95%置信区间下的扩展不确定度,建立了双道氢化物发生原子荧光光度仪测定食品添加剂中砷含量的不确定度评定方法。砷含量测试结果表述为1.73±0.24 mg/kg。评定结果表明,不确定度主要来源于标准中间液和校准工作溶液的配制、曲线拟合过程以及重复性测试。According to the national compulsory food safety standards National food safety standard -De- termination ofarsen＆ in food additives （GB 5009.76 -2014）, which was just fully implemented, the mathematical model for determination of arsenic content in food additives was introduced by investigating from the standard solution with the baking powder as a representative sample. The components of uncer- tainty in the detection process were classified and quantified, and were evaluated systematically. The combined uncertainty and the expanded uncertainty at 95 % confidence intervals were obtained. Finally, the evaluation of uncertainty for determination of arsenic content in food additives by double channel hy- dride generation atomic fluorescence spectrometer was established. The experimental determination result was arsenic content 1.73 ± 0.24 mg/kg. The major uncertainty sources were the preparation of standard intermediate liquid and calibration working solution, curve fitting process and repeatability test.

关 键 词：氢化物原子荧光光谱法 食品添加剂 砷 不确定度 

分 类 号：TS210.7[轻工技术与工程—粮食、油脂及植物蛋白工程] TS202.3[轻工技术与工程—食品科学与工程]