肠类制品中盐酸克伦特罗含量测定的不确定度分析

Analysis of the Uncertainty of the Determination of Clenbuterol Hydrochiloride in Sausage Products

本文利用气相色谱-质谱法(GC-MS法)测定了肠类制品中盐酸克伦特罗(CLB)残留量,并对检测结果的不确定度进行分析和计算,得出CLB的扩展不确定度为0.356μg/kg,并对测量结果进行表述(2.676±0.356)μg/kg。通过对各个分量不确定度的分析结果可知,标准曲线拟合、样品重复测定及加标回收率重复测定是不确定度的主要来源。

The residue clenbuterol hydrochiloride(CLB)in sausage products is determined by gas chromatography-mass spectrometry(GC-MS),and the uncertainty of the determination results are analyzed and calculated.The expanded uncertainty of CLB is 0.356μg/kg,and the measured results are(2.676±0.356)μg/kg.Through the analysis of the uncertainty of each component,it can be seen that the standard curve fitting,the repeated determination of the sample and the repeated determination of the recovery rate are the main sources of uncertainty.