As the sample is carried into the detector by the carrier gas, electron-absorbing analyte molecules capture electrons and thereby reduce the current between the collector anode and a cathode. The analyte concentration is thus proportional to the degree of electron capture.
Larsen is an unincorporated community in the town of Clayton, in  Winnebago County, Wisconsin, United States. A post office called Larsen has been in operation since 1898. The community was named for Philip Larsen, the first storekeeper there.
Waterloo is a town in Jefferson County in the U.S. state of Wisconsin. The population was 909 at the 2010 census. The city of Waterloo is located within the town. The unincorporated community of Portland is also located partially in the town.