title: The internal exposure of Taiwanese to phthalate--an evidence of intensive use of plastic materials.
abstract: Phthalates are widely used in industry and consumer products. Di-(2-ethylhexyl) phthalate (DEHP) and di-n-butylphthalate (DBP) show the greatest potency of reproductive toxicants among phthalates. The purposes of this study are to examine the migration level of phthalate from PVC films by simulating food handling and to reveal the body burden of phthalate for Taiwanese. In order to estimate a worst-case of phthalate migration, food was covered with polyvinyl chloride (PVC) films and then microwave heated. Results show that DEHP level in food increased significantly after heating for 3 min. Under the heating condition, the calculated intake of phthalate and the percentage of the tolerable daily intake (TDI, based on body weight of 60 kg) from eating one 400-g meal were 1705.6 microg and 92.2% for DEHP. Determination of urinary metabolites from 60 subjects reveals more than 90% of samples were detectable for mono-methyl phthalate (MMP), mono-butyl phthalate (MBP) and mono-ethylhexyl phthalate (MEHP). Notably, the median value of estimated daily intake of DEHP had reached 91.6% of TDI established by the European Union Scientific Committee for Toxicity, Ecotoxicity and the Environment (CSTEE) (1998). Thirty-seven percent of the study population exceeded the TDI and 85% exceeded the reference dose (RfD) of the US EPA. We conclude that the body burden of DEHP for Taiwanese reflects the intensives use of plastic materials in the region. The regulation of PVC for food preparation is necessary.
authors.affiliation: Institute of Environmental and Occupational Health Sciences, College of Medicine, National Yang Ming University, Taipei, Taiwan.
authors.forename: Mei-Lien
authors.initials: ML
authors.lastname: Chen
authors.forename: Jing-Shieng
authors.initials: JS
authors.lastname: Chen
authors.forename: Chia-Ling
authors.initials: CL
authors.lastname: Tang
authors.forename: I-Fang
authors.initials: IF
authors.lastname: Mao
mesh_terms: D000328:Adult; D000368:Aged; D004781:Environmental Exposure / Q000032:analysis*; D005260:Female; D005504:Food Analysis; D005511:Food Handling / Q000379:methods*; D006801:Humans; D008297:Male; D008452:Maximum Allowable Concentration; D008875:Middle Aged; D010795:Phthalic Acids / Q000032:analysis*; D010969:Plastics / Q000737:chemistry*; D013624:Taiwan; D014556:Urine / Q000737:chemistry
chemical_list: D010795:Phthalic Acids; D010969:Plastics; C032279:phthalic acid