Table 1.

The migration rate of hydrogen (μg/L per hour) from the inside to outside of various containers

Material of container	Migration rate of hydrogen
	0–2 h	4–12 h
Polyethylene	225	27.5
Polyethylene terephthalate	135	23.1
Polypropylene	180	20
Glass	190	30
Aluminum	0	1.3
Stainless steel	0	0.6

Note: The aluminum- or stainless steel-made container repressed the movement of hydrogen from inside to outside. Measurements for each material of container were performed more than three times and typically the mean values were described.