Negative ion mass spectrometry and the detection of carbonyls and HCN from clover

We have demonstrated that negative ion‐chemical ionization mass spectrometry (NI‐CIMS) can be used to distinguish several isomeric volatile organic compounds (VOCs) that are emitted from wounded plants. Reaction chemistry with HO−, hydrogen/deuterium exchange patterns, and collision‐induced dissocia...

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Bibliographic Details
Published in:Geophysical research letters 2000-12, Vol.27 (23), p.3849-3852
Main Authors: Custer, Thomas G., Kato, Shuji, Fall, Ray, Bierbaum, Veronica M.
Format: Article
Language:English
Subjects:
Chemical composition and interactions. Ionic interactions and processes
Earth, ocean, space
Exact sciences and technology
External geophysics
Meteorology
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Summary:We have demonstrated that negative ion‐chemical ionization mass spectrometry (NI‐CIMS) can be used to distinguish several isomeric volatile organic compounds (VOCs) that are emitted from wounded plants. Reaction chemistry with HO−, hydrogen/deuterium exchange patterns, and collision‐induced dissociation spectra allow identification of the isomers. Laboratory studies of emissions from wounded clover using NI‐CIMS show several previously detected VOCs, but also clearly demonstrate the emission of HCN. This compound is presumably formed by the decomposition of cyanogenic glycosides which also form aldehyde and ketone byproducts. These results suggest that NI‐CIMS may be a valuable tool for investigating VOCs and HCN release from vegetation.
ISSN:0094-8276
1944-8007
DOI:10.1029/2000GL011873