Method Validation and Determination of Dioxins and PCBs in Plastic Bottled Water at A Specific Condition
Keywords:
dioxins and PCBs, method validation, plastic bottles, drinking waterAbstract
The objective of this study was to validate a modified method, based on the U.S. EPA Methods 1613B and 1668C, using isotope dilution technique and High Resolution Gas Chromatograph/High Resolution Mass Spectrometer. As a result of the method validation, limits of quantitation were 1.6-16 picogram/Litre (pg/L) for polychlorinated dibenzo para dioxins/furans (PCDDs/Fs), 27 pg/L for dioxin–like polychlorinated biphenyls (DL-PCBs) and 0.16 nanogram/Litre (ng/L) for non-dioxin–like polychlorinated biphenyls (NDL-PCBs). Its accuracy and precision has been shown within acceptable ranges. Consequently, the validated method was used for analyzing 18 samples of plastic bottled water, which had been left in cars exposed to sunlight for 1 day and 7 days. The obtained results revealed that PCDDs/Fs and DL-PCBs were not found in all samples. Therefore, consumers could be ensured that there is no dioxin contamination in plastic-bottled water that might affect human health.
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