Secondary ozonides of substituted cyclohexenes: A new class of pollutants characterized by collision-induced dissociation mass spectrometry using negative chemical ionization

被引：10

作者：

Norgaard, Asger W. ^{[1
]}

Noigaard, Jacob K. ^{[1
]}

Clausen, Per A. ^{[1
]}

Wolkoff, Peder ^{[1
]}

机构：

[1] Natl Res Ctr Working Environm, Indoor Environm Grp, DK-2100 Copenhagen, Denmark

来源：

CHEMOSPHERE | 2008年 / 70卷 / 11期

关键词：

indoor air; mass spectrometry; secondary ozonides; substituted cyclohexenes; GAS-PHASE OZONOLYSIS; CLEANING PRODUCTS; AIR FRESHENERS; CHEMISTRY; ALKENES; OZONE;

D O I：

10.1016/j.chemosphere.2007.09.018

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Recent studies indicate that secondary ozonides of cyclic alkenes are formed in atmospheric reactions and may be relatively stable. The secondary ozonides (SOZs) of cyclohexene (1), 1-methylcyclohexene (2), 4-isopropyl-1-methylcyclohexene (3) and 4-isopropenyl-1-methylcyclohexene (limonene) (4) have been characterized by rapid gas chromatography electron ionization (EI), negative and positive chemical ionization (CI: ammonia, isobutane and methane) and collision-induced dissociation (CID) mass spectrometry. Both El and positive CI spectra were found unsuitable for reproducible analysis. However, negative CI showed stable (M-H)(-) ions with minor fragmentation. CID of the (M-H)- ions resulted in simple and reproducible fragmentation patterns for all four SOZs with loss of m/z 18, 44 and 60, tentatively assigned as H2O, CO2 and C2H4O2 or CO3, respectively. Thus, negative CI-MS-MS in combination with rapid gas chromatography is the preferred method for identification of secondary ozonides of cyclohexenes. (c) 2007 Elsevier Ltd. All rights reserved.

引用

页码：2032 / 2038

页数：7

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