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Isotopic composition of bottled water in Saudi Arabia

ABSTRACT The 18O/16O and 2H/1H ratios of 18 water brands representing the most popular bottled water brands in the Saudi market were measured using a system based on the latest advancements in tunable off-axis integrated cavity output diode laser spectroscopy (OA-ICOS) in the near-infrared spectral region. Utilizing δ18O and the δ2H values of locally produced water samples, a meteoric water line (δ2H = 7.84 δ18O + 2.11) was extracted and found to be consistent with the slope of the global meteoric water line (GMWL) and the geographic location of Saudi Arabia.