Abstract:

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
aqueous 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 plastic food packaging materials.

Key words: plastic food packaging materials, migration of plasticizers, di(isononyl) cyclohexane-1,2-dicarboxylate (DINCH), gas chromatography-mass spectrometry (GC-MS)