The time resolution of the here presented system is high enough to generate differential signals in reference to the time scale of the cell cycling. This is achieved by using a carrier gas, which purges the formed gases from the cell . For such systems, the term differential electrochemical mass spectrometry (DEMS) was derived . This is in contrast to other systems which can have a similar time resolution, but measure accumulated gas amounts over time . In general, both descriptions apply to the method discussed here, but for the sake of simplicity we will only use the term DEMS in the following.