A1:

There is no national or industrial standard for high-concentration hydrogen. In our company, it is over 500ppb.

A2:

It depends on the material of the container, but in the case of PET bottles, it can be considered that hydrogen will be exhausted after 2 to 3 hours. Aluminum does not pass hydrogen, but even after half a day, the amount of hydrogen will be halved. Even an aluminum bottle cannot completely shut off the air, so the amount of hydrogen will gradually decrease when it comes into contact with oxygen in the air.

A3:

It is said that 400ppb (0.4ppm) or more is effective in the researcher's books. In the world of 1 atm where we usually live, the saturated state of hydrogen is about 1600 ppb (1.6 ppm), but by compressing the inside of the container, more than saturated hydrogen enters. However, in this case, opening the mouth of the container causes hydrogen to escape at once. Large numbers do not mean dramatic changes. Ideally, silky pure or silky should be electrolyzed just before it is used for drinking or cooking, and used when it contains a large amount of hydrogen. It is recommended to drink a certain amount of hydrogen water every day.

A4:

In the case of water, the concentration will be halved in one hour. Example) 900 ppb → about 450 ppb In the case of boiling water, it takes about half in about 30 minutes. Example) 550ppb → 274ppb If more than 2 hours have passed since the generation, please regenerate and drink. High concentration hydrogen water can be used anytime by generating just before use.