Membrane inlet for ion mobility spectrometry (plasma chromatography)

Abstract

Reactant-ion distributions in ion mobility spectrometry (IMS) with a membrane inlet system have been studied using ion mobility spectrometry/mass spectrometry (IMS/MS). The membrane was able to exclude the water and ammonia components of laboratory air from the carrier gas of the instrument, but not carbon dioxide. Nonporous dimethylsilicone membranes were found to exclude these components more effectively than microporous polypropylene membranes.