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Solubility of H2 in normal and hydrogen-rich water at different time points. The solubility of H2 in normal or hydrogen-rich water was detected at 0, 10 and 30 min, and 1, 12 and 24 h after blowing the hydrogen gas into the drinking water. The flow rate of H2 was 400 mL/min at the first 10 min and 100 mL/min from 10 min to 24 h. The H2 solubility was measured three times at each time point. H2, molecular hydrogen. *P<0.05 vs H2O group.
