https://www.eurekalert.org/pub_releases/2021-04/uoc-pt042921.php
News Release 29-Apr-2021
University of Cincinnati researchers find some water bottles thought to be safe actually have transient BPA release
University of Cincinnati
As part of a laboratory experiment, Rebecca Holmes examined water bottles that had been acquired from abroad expecting to find bisphenol A (BPA), a human-made component commonly found in polycarbonate plastics used to make consumer products.
What she found, however, was that those water bottles were just fine, yet some control bottles purchased in the United States and supposedly BPA-free actually contained traces of the chemical now thought to negatively impact heart health.
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Researchers washed the Tritan bottles that showed release of BPA up to six times, and at that point there was no longer any detectable release of BPA. A past study by a different group of researchers shows rinsing was effective in removing BPA release from the Tritan bottles they tested, so effectiveness of washing methods likely depends on the specific bottle. The bioactivity of the leached BPA from the bottles in the UC study was confirmed by examining the cardiovascular systems of transparent blackworms and the heart tissue of mice exposed to water in these containers over a seven-day period.
"BPA is an endocrine disruptor, and it acts like estrogen and it can affect the cardiovascular system along with other systems," says Holmes. "It can contribute to irregular heart rhythms."
Wang explains that as part of the team's project Holmes visited a plastics manufacturing factory to get a better understanding of how BPA might have gotten onto BPA-free containers.
"I wanted to go to a plant to see how plastic products are made," says Holmes. "I was able to tour the facility and none of the products in this facility were for consumer purposes. It was to see how the process works. What I found is that similar products with different types of plastic were being made closely together."
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