Mass Spectrometric Detection of Gaseous Hydrogen Peroxide in Ambient Air Using Dielectric Barrier Discharge as an Excitation Source

Abstract Real-time detection of gaseous hydrogen peroxide (H2O2) in ambient air is an important subject for public safety and security. We have developed a mass spectrometric detection system for gaseous H2O2 using dielectric barrier discharge as the excitation source for metastable rare gas atoms. The O2− ion produced by Penning ionization of ambient air forms a stable cluster ion [H2O2+O2]− which is detected by an orthogonal time-of-flight mass spectrometer. No interference by the moisture in the air was observed.

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