Objective To evaluate the uncertainty in determination of olive oil total migration by gas chromatography spectrometry,determine the factors affecting the accuracy of the results and provide a basis for accurate control of the olive oil total migration.Methods Gas chromatography spectrometry was used to determine the olive oil total migration,and a mathematical model was established.According to relevant rules and standards for uncertainty evaluation,the uncertainty was evaluated including repeatability,sample quality and adsorbed olive oil quality,instrument calibration,standard curve fitting,soaking area,etc.Results When The total migration of olive oil in the sample is 4.0 mg/dm2,the expanded uncertainty was 1.3 mg/dm2(P=95％,k=2).Conclusion The uncertainty of olive oil total migration mainly comes from repeatability,standard solution preparation and standard curve fitting.
total migrationuncertaintygas chromatography spectrometryolive oil
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