Measurement of gas-phase hydroperoxides by chemical ionization mass spectrometry

Creators: Crounse, John D.; McKinney, Karena A.; Kwan, Alan J.; Wennberg, Paul O.

Abstract

A new method for the detection of gas-phase hydroperoxides is described. The clustering chemistry of CF_(3)O^(-) is exploited to produce speciated measurements of several hydroperoxides with high sensitivity and fast time response. Correspondence of airborne observations made with this technique and the established HPLC method is illustrated. CF_(3)O^(-) appears to be a highly versatile reagent ion for measurements of both weak and strong acids in the atmosphere.

Additional Information

© 2006 American Chemical Society. Received for review March 8, 2006. Accepted June 28, 2006. We thank Dan O'Sullivan, Julie Snow, Haiwei Shen, and Brian Heikes for allowing us to show their H_(2)O_(2) and PAA data prior to publication. We thank Norton Allen and James Oliver for their assistance in the preparation of the CIMS instrument for the DC-8. We thank Suresh Dhaniyala for his assistance in the design of the inlet. Funding for this work was provided by a grant from the National Aeronautics and Space Administration (NAG: NNG04- GA59G). J.D.C. and A.J.K. thank the EPA-STAR Fellowship Program (FP916334012) and the NSF Graduate Research Fellowship program, respectively, for providing support. This work has not been formally reviewed by the EPA. The views expressed in this document are solely those of the authors and the EPA does not endorse any products or commercial services mentioned in this publication.

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