Abstract: Peanut and rapeseed with different contents of plastic impurities (polypropylene (PP) woven bag and polyethylene (PE) bag) were collected, and crude oils were obtained from the two oilseeds by solvent extraction and pressing, respectively. The contents of six phthalates acid esters (PAEs) in crude oils were detected, and the influence of plastic impurities in plant oilseeds on the contents of PAEs in crude oil was studied. The results showed that the contents of PAEs in crude oil increased with increasing contents of plastic impurities in peanut and rapeseed. The average contents of PAEs in crude peanut and repeseed oil without plastic impurities were 1.130 and 0.503 mg/kg, respectively. The average contents of PAEs in peanut oil and rapeseed oil samples from oilseeds containing 0.5% of PP woven bag impurities were 1.538 and 0.684 mg/kg, respectively, which were 1.36 and 1.36 times higher than that in the corresponding control oils (extracted from oilseeds without plastic impurities), respectively. In the case of oilseeds containing 0.5% of PE bag impurities, the average contents of PAEs were 2.810 and 1.556 mg/kg in peanut and rapeseed oil, respectively, which were 2.49 and 3.09 times higher than that in the control oils, respectively. The contents of PAEs were 2.245 and 0.851 mg/kg in peanut and rapeseed oil from oilseeds with 1.0% of PP woven bag impurities respectively, which were 1.99 and 1.69 times higher than that in the control oils, respectively. The average contents of PAEs were 3.391 and 2.121 mg/kg in peanut and rapeseed oils from oilseeds with 1.0% of PE bag impurities, respectively, which were 3.00 and 4.22 times higher than that in the control oils, respectively. Oilseeds with PE plastic bags caused higher risk of PAEs pollution in oils than with PP plastic woven bags, and the solvent extracted oil had higher risk of pollution than the one obtained by pressing.

Key words: plant oilseeds, plastic impurities, solvent extracted crude oils, pressed crude oils, phthalates acid esters