Safety of Polycarbonate Water Carboys for Residual and Migration Levels of Bisphenol-A
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Date
2020
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Abstract
Polycarbonate (PC) materials are widely used for the packaging of drinkable water. The use of PC materials as foodpackaging raises some concerns for the migration of Bisphenol A (BPA), which is the monomer of PC. Therefore, inthis research, it was aimed to determine the quality of new (not used before) and old (life time ended) PC watercarboys in terms of residual BPA and BPA migration levels with respect to storage conditions. For thispurpose, BPA migration was determined by storing at three different temperatures (5, 20 and 40C) for sevendifferent storage times (1., 5., 10., 20., 30., 45. and 60 days.) Residual and migrated BPA levels were determined byHigh Performance Liquid Chromatography with Fluorescence Detector. As a result, PC water carboys contained lowlevels of residual of BPA, and lower or higher residual BPA levels were detected in old materials compared to newmaterials. The BPA migration level increased by temperature and time, and storage under sunlight increased thelevel of BPA migration. BPA migration levels under all storage conditions were below the specific migration limit forBPA. In order to reach the tolerable daily intake of BPA even under the worst storage condition of PC water carboys,daily water consumption was calculated as 16 liters for a person with a body weight of 60 kg. On the other hand, thisdaily water consumption might not be rational for a person. Therefore, it was concluded that PC water carboyspossessed no risk in terms of BPA migration levels under the conditions studied.