Abstract
Combination of electron impact ionization (EI-MS) and electrospray ionization mass spectrometry (ESI-MS) allowed us for simultaneous quantitative online detection of both volatile (carbon dioxide) and non-volatile (formic acid and formaldehyde) reaction products during continuous methanol electrooxidation. The overall reaction rate was monitored via the Faradaic current, carbon dioxide formation was followed mass spectrometrically (electron impact mass spectrometry) via a membrane inlet system in a thin-layer flow-cell, while formaldehyde and formic acid were detected by ESI-MS after the online derivatization-extraction-separation procedure described previously (W. Zhao et al., Anal. Chem. 82, 2472 (2010)).
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