In the Deep Convective Clouds and Chemistry (DC3) field campaign, a multi-reagent ion chemical ionization mass spectrometry (CIMS) method, using O2-, CO3-, CO4-and I- asreagent ions, was flown on the National Center for Atmospheric Research Gulfstream-V aircraft to quantify hydrogen peroxide (H2O2) and methyl hydroperoxide (CH3OOH).   Rapid quantification of gas phase peroxide concentrations is desirable for airborne field work where changes in concentration occur at space-time scales on the order of a second or tens of meters; CIMS methods hold promise for fast airborne measurements of the peroxides.  Field measurements are presented for CH3OOH and H2O2monitored at masses 80 and 110 by the formation of ion-molecule clusters attributed to CH3OOH�O2- and H2O2�CO4-, respectively.  Supporting CIMS laboratory and field experiments and ab initio calculations are also presented to elucidate the ion-molecule reactions resulting in the formation of peroxide-ion adducts within a complex and varying ambient air matrix.

Peroxide measurements in the Deep Convective Clouds and Chemistry campaign using multi-reagent ion chemical ionization mass spectrometry and ab initio calculations

245th National Meeting (2013)

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