Determination of vinyl chloride,1,1-dichloroethane and 1,2-dichloroethane monomer in food packaging materials by capillary gas chromatography with auto headspace sampling

Objective:To establish an analytical method for determination of vinyl chloride,1,1-dichloroethane and 1,2-dichloroethane monomer in food packaging materials by headspace capillary gas chromatography.Methods: Vinyl chloride,1,1-dichloroethane and 1,2-dichloroethane monomer were collected from a standard solution or samples using a headspace system,then analyzed by GC.External standards methods were used for quantitation.DB-624 capillary column and flame ionization detector(FID) were employed.Results: The linear correlation coefficients of the method for vinyl chloride,1,1-dichloroethane and 1,2-dichloroethane monomer were 0.9950,0.9992 and 0.9977,respectively(n=5).The average recoveries were in the range of 84%~102% with relative standard deviations of 0.29%~1.72%.Conclusion: The method was simple and quick.It was suitable for the determination of residual vinyl chloride,1,1-dichloroethane and 1,2-dichloroethane monomer in food packaging materials.