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Rapid Commun Mass Spectrom

Title:		"The reactions of H(3)O(+), NO(+) and O(2) (+) with several flavourant esters studied using selected ion flow tube mass spectrometry"
Author(s):		Iachetta L; Malek L; Ross BM;
Address:		"Department of Biology, Lakehead University, 955 Oliver Rd., Thunder Bay, Ontario, P7B 5E1, Canada"
Journal Title:		Rapid Commun Mass Spectrom
Year:		2010
Volume:		24
Issue:		6
Page Number:		815 - 822
DOI:		10.1002/rcm.4439
ISSN/ISBN:		1097-0231 (Electronic) 0951-4198 (Linking)
Abstract:		"The reactions of H(3)O(+), NO(+), and O(2) (+) with nineteen ester compounds occurring naturally in plants, and having important flavourant properties, were examined using selected ion flow tube mass spectrometry (SIFT-MS). The H(3)O(+) reactions primarily generate [R(1)COOR(2).H](+), and may also produce [R(2)](+) fragment ions and/or fragmentation within the ester linkage. Collisional association/adduct ions, [R(1)COOR(2).NO](+), are the main products formed in the NO(+) reactions, although the carboxyl fragment ion is also detected frequently. The identification of the parent compound may be made more easily in the H(3)O(+) and NO(+) reactions. The inclusion of O(2) (+) reactions in the analysis provides additional information, which may be applied when the identity of a parent compound cannot be determined solely from the H(3)O(+) and NO(+) analysis. Consideration of the product ions generated with the three precursors suggests that SIFT-MS can differentiate between many of the esters investigated, including isomers, although the product ions generated in the reactions with some esters are too similar to allow independent quantification. Our data therefore suggest that SIFT-MS may be a useful tool to rapidly analyse and quantify flavourant esters in complex gas mixtures"
Keywords:		Esters/*chemistry Gases/chemistry Kinetics Mass Spectrometry/*methods Molecular Weight Nitrogen Oxides/*chemistry Onium Compounds/*chemistry Oxygen/*chemistry Volatile Organic Compounds/chemistry;
Notes:		"MedlineIachetta, Liana Malek, Lada Ross, Brian M eng England 2010/02/27 Rapid Commun Mass Spectrom. 2010 Mar; 24(6):815-22. doi: 10.1002/rcm.4439"