Determination of the Migration of Non-phthalate Plasticizer DINCH in Plastic Food Packaging Materials by GC-MS

The migration of non-phthalate plasticizer, di(isononyl) cyclohexane-1,2-dicarboxylate(DINCH) in plastic food packaging materials was evaluated by GC-MS. Distilled water, 3%(V/V) acetic acid aqueous solution and 15%(V/V) ethanol a queous solution were used as aqueous food stimulants and isooctane as a fatty food stimulant. The aqueous food stimulants were extracted with n-hexane after food packaging materials were immersed in each of them. After being used to immerse samples, the fatty food stimulant was blown to dryness by nitrogen and then re-dissolved and diltetedin n-hexane direct injection. The results showed that the linear range was between 10 μg/mL and 400 μg/mL(r = 0.9999), and the recoveries of DINCH ranged from 95.2% to 103.4% with relative standard deviation(RSD) of less than 5% in four stimulants. The developed method is accurate and repeatable. It can be used for the evaluation of DINCH migration in p lastic food packaging materials.