Abstract
A method based on isotope dilution headspace solid-phase microextraction and gas chromatography/mass spectrometry was used to assess levels of bisphenol A (BPA) in 56 samples of bottled water products sold in Canada. Levels of BPA in samples of all 51 non-polycarbonate (PC) bottled water products were lower than the method detection limit (0.50 µg l–1). Levels of BPA in most bottled water products in PC carboys were low, ranging from <0.50 to 1.4 µg l–1 with an average of 0.75 µg l–1. However, BPA was detected at levels of 8.8 and 6.5 µg l–1 in two bottles of the bottled water products in PC carboys from the same product analysed over a 5-week period, likely due to accidental or careless exposure of the products to heat (e.g. under the sun) during storage and/or transportation for extended periods of time.
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