Evaluation of Uncertainty of 1,1-dichloroethlene in food package by gas chromatography Spectrometer

Uncertainties originated from the measurement of 1,1-dichloroethlene in food package by gas chromatography were evaluated.The uncertainty components of the measurement results were analyzd and quantified.The results indicated that the standard solution was the biggest factor for the uncertainty in measurement,generally followed by the 1,1-dichloroethlene content calculation based on the standard curve and the determination repeatability.These three items were the important uncertainty sources of this determining method.As the measuring the results of 1,1-dichloroethlene was 23.6mg/kg,the expanded uncertainty was 2.1334mg/kg(k=2).