confining liquid

confining liquid

[kən′fīn·iŋ ‚lik·wəd]
(chemical engineering)
A liquid seal (most often mercury or sodium sulfate brine) that is displaced during the no-loss transfer of a gas sample from one container to another.
References in periodicals archive ?
The biogas produced in fermenters supplants the confining liquid in the gas pipe into the outside levelling vessel of 750 ml volume.
At the top a shelf is provided on which there are the levelling vessels for surplus confining liquid.