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Hydroxyaldehyde Products From Hydroxyl Radical Reactions of Z-3-hexen-1-ol and 2-methyl-3-buten-2-ol Quantified by SPME and API-MS

Hydroxyaldehyde Products From Hydroxyl Radical Reactions of Z-3-hexen-1-ol and 2-methyl-3-buten-2-ol Quantified by SPME and API-MS

Fabienne Reisen, Sara M Aschmann, Roger Atkinson, Janet Arey

Environ Sci Technol. 2003 Oct 15;37(20):4664-71.

PMID: 14594376

Abstract:

Hydroxyaldehyde products of the OH radical-initiated reactions (in the presence of NO) of two volatile vegetative emissions, Z-3-hexen-1-ol and 2-methyl-3-buten-2-ol, were examined to assess the qualitative and quantitative potential of two analysis techniques (1) sampling by Solid-Phase MicroExtraction (SPME) with on-fiber derivatization followed by gas chromatographic analyses and (2) in situ analysis by negative ion mode atmospheric pressure ionization mass spectrometry (API-MS). The compounds were chosen because reaction mechanisms predict hydroxyaldehyde products, and reliable coproduct yield data are available. The API-MS analyses showed product ion peaks attributed to the NO2- adducts of 3-hydroxypropanal and dihydroxynitrates from Z-3-hexen-1-ol, and a formation yield of 3-hydroxypropanal of 44% was derived. Product ion peaks attributed to NO2- adducts of glycolaldehyde [HOCH2CHO], 2-hydroxy-2-methylpropanal [(CH3)2C(OH)CHO], and dihydroxynitrates were observed by API-MS from 2-methyl-3-buten-2-ol, and a formation yield of 2-hydroxy-2-methylpropanal of 16% was obtained. In experiments with SPME sampling, the formation yields of hydroxycarbonyls measured as their oxime derivatives were as follows: from Z-3-hexen-1-ol, propanal, 56 +/- 8%; 3-hydroxypropanal, 101 +/- 24%; and from 2-methyl-3-buten-2-ol, 2-hydroxy-2-methylpropanal, 31 +/- 4%. Both the API-MS and SPME analyses provided product information, and hydroxycarbonyl yields from the SPME data are in reasonable agreement with previously measured formation yields of coproducts.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP115184	2-Methyl-3-buten-2-ol		115-18-4	Price

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