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Direct Analysis of Highly Oxidised Organic Aerosol Constituents by On-line Ion Trap Mass Spectrometry in the Negative-ion Mode by Bettina Warscheid; Thorsten Hoffmann is a Chemistry article available to read on EtoBox.

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## Abstract On‐line ion trap mass spectrometry (ITMS) enables the characterisation of constituents of biogenic secondary organic aerosols in complex organic reaction mixtures. This real‐time analysis is achieved by directly introducing the airborne particles into the ion source of the mass spectrometer. Negative‐ion chemical ionisation at atmospheric pressure (APCI(−)) was used as the ionisation method of choice. The aerosols were generated from the gas‐phase ozonolysis of two C~10~H~16~‐terpenes (α‐pinene and limonene), and investigated by performing on‐line APCI(−)−ITMS^n^. Highly oxidised compounds were tentatively identified as important particle‐phase products. Based on recent investigations of low‐energy collision‐induced dissociation pathways of a wide range of deprotonated multifunctional carboxylic acid species derived from monoterpene precursors (Warscheid B, Hoffmann T. __Rapid Commun. Mass Spectrom__. 2001; 15: 2259), the formation of structurally different C~10~H~16~O~5~ and C~10~H~16~O~6~ species, such as acidic esters from α‐pinene and aldo‐hydroxycarboxylic acids from limonene, is proposed. Copyright © 2002 John Wiley & Sons, Ltd.

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Author

Bettina Warscheid; Thorsten Hoffmann

Publisher

John Wiley and Sons; Wiley (John Wiley & Sons); John Wiley & Sons Inc.; Wiley (ISSN 0951-4198)

Published

2002

Language

EN

Field

Chemistry (Physical Sciences)