Hi Yelong, thanks for you interest, I asked this question to learn a little more about membranes and cell designs used. Can you give me some information related to that? Are you performing experiments in real time or using a gas carrier after the reaction?
I think you want use membranes to prevent the electrolyte to damage the MS as other papers reported. I use a cold trap instead of the membraners. I perform bothe into-DEMS and gas carrier after the reaction.