抑制电导离子色谱法测定奶酪中硫氰酸根的不确定度评定  

Evaluation of uncertainty for the determination of thiocyanate in cheese by inhibited conductivity Ion Chromatography

作　　者：潘灿盛 张志舟 夏冰 张飞 吴平 吴凌涛 PAN Can-sheng;ZHANG Zhi-zhou;XIA Bing;ZHANG Fei;WU Ping;WU Ling-tao(Guangdong Academy of Sciences〔China National Analytical Center,Guangzhou〕,Guangzhou,Guangdong 510070,China;Guangdong Provincial Key Laboratory of Chemical Measurement and Emergency Test Technology,Institute of Analysis,Guangzhou,Guangdong 510070,China;Guangdong Provincial Engineering Research Center for Efficacy Component Testing and Risk Substance Rapid Screening of Health Food,Guangzhou,Guangdong 510070,China)

机构地区：[1]广东省科学院测试分析研究所〔中国广州分析测试中心〕,广东广州510070 [2]广东省化学测量与应急检测技术重点实验室,广东广州510070 [3]广东省保健食品功效成分检测与风险物质快速筛查工程技术研究中心,广东广州510070

出　　处：《食品与机械》2023年第3期49-54,121,共7页Food and Machinery

基　　金：广东省科学院建设国内一流研究机构行动专项资金项目(编号:2020GDASYL-20200102007)。

摘　　要：目的:对采用抑制电导离子色谱法测定奶酪中硫氰酸根含量的不确定度进行评定。方法:用抑制电导离子色谱法对奶酪中硫氰酸根的含量进行测定并建立数学模型。分析了试验过程中所引入不确定度的来源,通过对各不确定度分量计算合成不确定度。结果:硫氰酸根的测定结果为(10.2±0.56)mg/kg,k=2,p=95%。结论:测量过程中的不确定度主要来自测试供试液中硫氰酸根浓度,样品回收率和重复性试验次之。Objective:To evaluate the uncertainty of the determination of thiocyanate in cheese by inhibition conductance ion chromatography.Methods:The content of thiocyanate in cheese was determined by inhibition conductance ion chromatography and a mathematical model was established.The source of uncertainty introduced in the process of the experiment was described,and the synthetic uncertainty was calculated for each uncertainty component.Results:The determination of thiocyanate was(10.2±0.56)mg/kg,k=2,p=95%.Conclusion:The uncertainty in the measurement process mainly comes from the concentration of thiocyanate in the test solution,followed by sample recovery and repeatability experiments.

关 键 词：不确定度 抑制电导离子色谱法 奶酪 硫氰酸根 

分 类 号：O657.7[理学—分析化学] TS252.7[理学—化学]