45D-28 |
Detection of hazardous monomers from PS, PC, PC and nylon after irradiation |
G. Y. PARK and H. J. Park. Graduate school of Biotechnology, Korea University, SungBuk-Gu Anam 5 Ga, Lab. of packaging engineering (Lab. 307), Seoul, 136-701, South Korea Food can be treated with ionizing radiation to reduce microbial contamination, to inhibit sprouting / ripening or to control insect infestation. Currently, interest about the food irradiation is increasing due to improvement in the food preservation and the food processing technique. And the food products are usually irradiated in their final packages in order to prevent recontamination. Several research results about the effect of food irradiation have been reported, but there were little research about the quantification of monomers from the packaging materials by GC/MS, SIM mode. Therefore we need to study about the detection of hazardous compounds from food packaging materials by more precise method. We quantified monomers – styrene monomer, bisphenol-A, å-caprolactam, vinyl chloride – from the food packaging materials – polystyrene, polycarbonate, nylon, poly(vinylchloride) – as irradiation dose increased. Target packaging materials, - polystyrene, polycarbonate, nylon, poly(vinylchloride) - which are widely used as the food packaging material are prepared. After these target materials were irradiated at the dose rate of 5~200 kGy, we analyzed the quantity of monomer residues - styrene monomer, bisphenol-A, å-caprolactam, vinyl chloride - which are induced from target materials. In the pretreatment step, we used the solvent extraction method or headspace analysis. The GC/MS (Gas Chromatography / Mass Spectrometry) instrument, SIM mode was used as the system of quantitative analysis. In the case of polystyrene and nylon, the quantity of monomer had a tendency of slight increase in the beginning and then decreased as the dose rate increased. And in the case of polycarbonate and poly(vinylchloride), the quantity of monomer tended to increase as the dose rate increased. So we can confirm that styrene monomers were oxidized to another derivatives in polystyrene. We can conduct more precise quantification of monomers from polymers by GC/MS, SIM mode. And we can assure the trend of monomers produced by irradiation.
Session 45D, Food Packaging: General
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