Exposure to Bisphenol A (BPA) in Fresh, Frozen and Canned Food from Texas, U.S.A

摘要

This study reports on an analysis of 204 samples of food obtained from Dallas Texas in 2010 for Bisphenol A (BPA). These samples included 92 samples of frozen and fresh foods and 112 samples of canned food. This data showed a meaningful difference in BPA concentrations in fresh and frozen foods compared to canned foods. BPA was detected in 7% of fresh and frozen foods, with a maximum concentration of 0.4 ng/g wet weight (ww). BPA was detected in 73% of canned foods, with concentrations from 0.2 -149 ng/g ww. A limited assessment of the exposure to BPA from food ingestion based on these data was conducted. Adult BPA intakes for these categories of foods were calculated: fruit, vegetables, meat (i.e., beef, pork, poultry), fish, and fruit juices. Intake totals considered average overall ingestion rates, the fraction of the foods that are canned and non-canned, and the average BPA concentrations for each category. The total ingestion intake of BPA was 12.6 ng/kg-day, of which 12.4 ng/kg-day was canned foods, most of which was canned vegetables at 11.9 ng/kg-day. This contrasts with total BPA intakes estimated from urinary BPA from the National Health and Nutritional Evaluation Surveys, which approximately range from 30 to 70 ng/kg-day for adult central tendency (NHANES cycles 2005/6 - 2009/10). Comparisons with measurements in canned foods in other surveys indicate that, except for vegetables, the concentrations found here were lower by one to two orders of magnitude. This could explain a portion of the difference in the intake estimates. This shortfall could also be explained by food and non-food pathways not considered in this limited intake assessment, including cosmetics, dust-related exposures and exposures from thermal paper such as credit card receipts.