摘要
目的评定液相色谱质谱法测定马口铁涂层中三聚氰胺迁移量的不确定度。方法采用液相色谱质谱法测定马口铁涂层中三聚氰胺迁移量,建立数学模型。根据不确定度评定相关规则和标准对实验过程中的不确定度因素包括重复性、标准溶液配制、仪器校准、标准曲线拟合、浸泡面积、浸泡体积等进行不确定度评定。结果当50%(V:V)乙醇溶液中三聚氰胺迁移量为0.038 mg/kg时,其扩展不确定度为0.007 mg/kg(P=95%,k=2)。结论马口铁涂层中三聚氰胺迁移量的不确定度主要来源有重复性测定、标准溶液配制和标准曲线拟合。
Objective To evaluate the uncertainty in determination of melamine migration in tinplate coating by liquid chromatography-mass spectrometry.Methods Liquid chromatography-mass spectrometry was used to determine the amount of melamine migration in the coating of tinplate,and a mathematical model was established.According to relevant rules and standards for uncertainty evaluation,the uncertainty was evaluated including repeatability,standard solution preparation,instrument calibration,standard curve fitting,soaking area,soaking volume,etc.Results When the migration amount of melamine in 50%(V:V)ethanol solution was 0.038 mg/kg,the expanded uncertainty was 0.007 mg/kg(P=95%,k=2).Conclusion The uncertainty of melamine migration in tinplate coating mainly comes from repeatability,standard solution preparation and standard curve fitting.
作者
陈明
钱凯
殷丽燕
潘祥华
CHEN Ming;QIAN Kai;YIN Li-Yan;PAN Xiang-Hua(Changzhou Import and Export Industry and Consumer Product SafetyTesting Center,Changzhou 213000,China)
出处
《食品安全质量检测学报》
CAS
2020年第4期1112-1116,共5页
Journal of Food Safety and Quality
关键词
马口铁涂层
三聚氰胺
迁移量
不确定度
液相色谱质谱法
tinplate coating
melamine
migration
uncertainty
liquid chromatography-mass spectrometry
作者简介
通讯作者:陈明,工程师,主要研究方向为食品接触材料检验检测。E-mail:chenmingciq@126.com
