MIGRATION OF BISPHENOL-A FROM POLYCARBONA TE PRODUCTS

The migration of bisphenol A from food contact polycarbonate products was investigated by HPLC with a quantitation limit of 0.5 ppb. The mig ration was affected by the test conditions and it increased in the ord er of water and 4% acetic acid at 60 degrees C, 30 min < 20% ethanol a t 60%, 30 min < water and 4% acetic acid at 95 degrees C, 30 min < n-h eptane at 25 degrees C, 60 min. It decreased sharply after repeated us e or when the products were boiled before the tests. Four contravened samples contained 379 similar to 599 ppm of bisphenol A, but the migra tion was under 40 ppb. Ten commercial products, e.g., infant's tablewa re, nursing bottles and a measuring cup, contained 5 similar to 80 ppm and migration was found from only 3 samples at under 5 ppb. The migra tions of phenol and p-tert-butylphenol from the same samples were also investigated.