摘要
目的:评定电感耦合等离子体质谱(Inductively Coupled Plasma Mass Spectrometry,ICP-MS)法测定油条中铝含量的不确定度。方法:依照GB 5009.268—2016测定油条中铝含量。计算试样质量、定容体积、标准溶液、标准工作曲线和样品重复测定引入的不确定度,通过建立数学模型,计算合成不确定度。结果:本次ICP-MS 法测定油条中的铝含量为(15.25±0.783 8)mg/kg,k=2。结论:检测结果的不确定度主要来源为重复性实验、标准溶液配制和工作曲线拟合。
Objective:To evaluate the uncertainty of inductively coupled plasma mass spectrometry (ICP-MS) method for the determination of aluminum content in fried dough sticks.Method:According to GB 5009.268—2016,the aluminum content in fried dough sticks was determined.Calculate the uncertainty introduced by the sample mass,constant volume,standard solution,standard working curve and sample repeated measurement,and calculate the synthetic uncertainty by establishing a mathematical model.Result:The ICP-MS method for the determination of aluminum content in fried dough sticks was (15.25±0.783 8) mg/kg,k=2.Conclusion:The main sources of uncertainty of test results are repeatability experiments,standard solution preparation and working curve fitting.
作者
吕昭玮
LV Zhaowei(Guangdong Institute of Product Quality Supervision and Inspection,Foshan 528300,China)
出处
《食品安全导刊》
2022年第3期97-100,共4页
China Food Safety Magazine
