Studies on the release of volatile compounds from soft plastic packaging materials during using

• Main Author: 余宗浩
• Other Authors: Yen Yue - Horng
• Format: Others
• Language: zh-TW
• Published: 1998
• Online Access: http://ndltd.ncl.edu.tw/handle/23625555073270839289

碩士 === 大葉大學 === 食品工程研究所 === 86 === Plastic packaging materials are extensively applied in the food packaging. But sometimes, those residues like monomers, oligomers and solvents are volatile and easily released when they contact with food. They are found especially significant when applied during heating. Therefore, the safety of these packaging materials is highly concerned. This study identified the volatile organic compounds from polyethylene(PE) bottles, polypropylene(PP) bowls, foaming polystyrene (FPS) bowls and high impact polystyrene(HIPS) cups. The volatile compounds were adsorbed by purge and trap system followed by solvent desorption and concentration. The concentrate was injected into gas chromatography and mass spectrometry for identified. The headspace autosampler analyzer equipped with gas chromatography was used to analyze these volatile organic compounds. The results indicated there were 54 volatile organic compounds, which included 40 alkanes, 5 alkenes, 2 ketones, 1 alcohol, 3 acids, 1 ester and 2 phenols, diffused from PE bottles. There were 42 volatile organic compounds, which included 19 alkanes, 3 alkenes, 14 benzenes, 2 phenols, 2 alcohols 1 ketone and 1 ester, diffused from FPS bottles under the same heating condition. There were 52 volatile organic compounds, which included 43 alkanes, 5 alkenes, 2 benzenes, 1 alcohol and 1 phenol, diffused from PP bottles. In addition, from HIPS cups, there were 23 volatile organic compounds, which included 14 alkanes, 2 alkenes, 6 benzenes and 1 alcohol. Volatile compounds diffused into different food simulants(water， 3% acetic acid， 15% ethanol and olive oil) from plastic packaging materials(PE、PP、FPS and HIPS) during heating were analyzed. Results showed the volatile compounds released into olive oil were more than those released into 15% ethanol、3% acetic acid and water. When olive oil was applied as food simulants, FPS bowls had higher release than other plastic packaging materials. When 15% ethanol、 3% acetic acid and water were applied as food simulants, PE bottles had higher release than other plastic packaging materials.