Abstract:

 OBJECTIVE: Preliminary studies were performed on a device for preparing hydrogen-rich water，preparation of hydrogen-rich water，and hydrogen-rich water preservation method. METHODS：After preparation of hydrogen-rich water， the effect of the ventilation under different pressures (0.1，0.2，0.3，0.4 MPa)，the different ventilation time (0.5，1，2，4，8 h) and the different vacuum time (0，5，10，30，60 min) on the hydrogen concentration of hydrogen-rich water were measured，and the impact of the temperature，storage containers，observing time，content and membrane filtration on the hydrogen concentration changes of hydrogen-rich water were also evaluated. RESULTS：The ventilation pressure had no significant effect on the hydrogen concentration(P>0.05).  Ventilation time and vacuum time showed a certain effect on hydrogen concentration when ventilating above 4 h or vacuum pumping more than 5 min，the hydrogen concentration increased significantly(P<0.05 or P<0.01)，which was gradually decreased with the extension of storage time(P<0.05). The storage container and the temperature of preservation had no obviously effect on hydrogen concentration(P>0.05). The amount of water loaded had obvious effect on hydrogen concentration(P<0.05). Filtration reduced hydrogen concentration(P<0.05). CONCLUSION：We have successfully prepared hydrogen-rich water in certain concentration，and studied the preservation methods of hydrogen-rich water.

Key words: hydrogen-rich water, preparation, stability, preservation method