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. Wang says it is also a good idea to follow a manufacturer's wash instructions on water bottles or other containers. Dishwashing is an effective way of removing the contamination in the specific kind of bottle we tested.”
If you are concerned about the possibility that the BPA-free bottles are contaminated, washing the bottles after purchase is a good idea. “While most of the bottles we tested were indeed BPA-free our study showed that there is a possibility that some may have BPA contamination. “Water bottles are ubiquitous on college campuses,” says Wang. Some used the bottle right away without washing, others rinsed them with water, while others either washed the bottle with water and soap or placed them in the dishwasher for cleaning. Wang says researchers decided to consider cleaning options for Tritan bottles after Holmes did an informal survey of 114 UC students about ways they commonly cleaned brand-name water bottles after purchase. “The release of BPA from these bottles could pose a health threat to the consumer,” says Ma. The results of their study is available in the scholarly journal Chemosphere. It showed that multiple cycles through the dishwasher was the most effective at removing BPA. The team then tested whether rinsing, handwashing or dishwashing removed the BPA from the Tritan bottles. They acquired 10 different Tritan bottles and detected BPA release from two kinds of Tritan bottles.
Holmes, Wang and Jianyong Ma, PhD, a research scientist at UC, decided to test an array of drinking bottles made of Tritan to see if transient BPA was present. They are using them so they are consuming BPA.” I was thinking people are buying those bottles off the shelves, and they are taking them home and probably not washing them. “We believed that it likely was BPA contaminant on the surface of the bottle,” says Holmes, who is now clinical research coordinator at Ohio State University’s Wexner Medical Center. Holmes, a researcher formerly in the laboratory of Hong-Sheng Wang, PhD, professor in the University of Cincinnati Department of Pharmacology and Systems Physiology, was working on her master’s degree in molecular, cellular and biochemical pharmacology in the College of Medicine at the time.
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