Differential Electrochemical Mass Spectrometry (DEMS) is an analytical method that is a combination of mass spectrometry and electrochemical half-cell experimentation. It is used in continuous faradaic reactions to identify products or intermediates and for characterizing the sub-monolayer levels of adsorbates on electrode surfaces through adsorption. 1. DEMS allows for in-situ mass resolved determination of reaction intermediates, gaseous or volatile electrochemical reactants, and products in real-time. A typical DEMS system comprises an electrochemical half-cell, membrane interface, and a vacuum system that includes a quadrupole mass spectrometer. Read more
