Abstract:

The sources of uncertainty in the determination of phenolic antioxidants in walnut oil by gas chromatographytriple
quadrupole mass spectrometry (GC-MS/MS) were analyzed, and a mathematical model for uncertainty evaluation was
established. The major uncertainty components were calculated and used to obtain the expanded uncertainties for the results
of determination of three phenolic antioxidants. The major uncertainty sources were determined as the purity of standard
substance and recovery of sample. This study can provide a reference for uncertainty evaluation of GC-MS/MS analysis.

Key words: gas chromatography-triple quadrupole mass spectrometry (GC-MS/MS), uncertainty, walnut oil, phenolic antioxidants