Table 4.

Total amount of gases (in mmoles) present in Interval 2 after complete consumption of acetate (after 78 days) and in Interval 1 after pulse injection with H₂ (after 78 days)

Gas species	Interval 1		Interval 2
	In solution	In gas phase
N2	0.012	3.5	1.7
N2O	<0.2	<0.03	0.37
H2	5.5	1.1 × 103	n.a.
O2	<0.004	<0.6	n.a.
CO2	0.1	0.02	n.a.

For Interval 1, the amount of gases present in solution and in the gas phase of the HEU is given. Due to the absence of a gas phase in Interval 2, the total amount of gases is only represented by the amount of dissolved gases in the interval solution

n.a. not analyzed