Measurement of monoterpenes and related compounds by proton transfer reaction-mass spectrometry (PTR-MS)

被引：181

作者：

Tani, A

Hayward, S

Hewitta, CN ^{[1
]}

机构：

[1] Univ Lancaster, Inst Environm & Nat Sci, Dept Environm Sci, Lancaster LA1 4YQ, England

[2] Tokai Univ, Sch High Technol Human Welfare, Shizuoka 4100395, Japan

来源：

INTERNATIONAL JOURNAL OF MASS SPECTROMETRY | 2003年 / 223卷 / 1-3期

基金：

英国自然环境研究理事会;

关键词：

monoterpenes; GC-FID; proton transfer reaction-mass spectrometry; PTR-MS;

D O I：

10.1016/S1387-3806(02)00880-1

中图分类号：

O64 [物理化学（理论化学）、化学物理学]; O56 [分子物理学、原子物理学];

学科分类号：

070203 ; 070304 ; 081704 ; 1406 ;

摘要：

The reactions of monoterpenes and related C-10 compounds with H3O+ in a proton transfer reaction-mass spectrometer (PTR-MS) were studied, with a view to better understanding the signal produced by this instrument when detecting these compounds. The monoterpenes alpha- and beta-pinene, 3-carene and limonene produced fragment ions of masses 67, 81 and 95 as well as a protonated molecular ion of mass 137, while p-cymene (C10H14) produced ions of masses 41, 91, 93 and 119 in addition to mass 135. The fragmentation patterns were observed to vary as E/N was varied. Camphor (C10H16O) did not fragment within the E/N range 80-120 Td. The proton transfer reaction rate coefficients for these monoterpene species with H3O+ were found to be 2.2 x 10(-9) to 2.5 x 10(-9) cm(3) s(-1). For camphor the rate coefficient was 4.4 x 10(-9) cm(3) s(-1). Water vapour pressure in the inlet air affected the fragmentation pattern for p-cymene, limonene and 3-carene. The uncertainties associated with the PTR-MS measurement of these compounds are discussed. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：561 / 578

页数：18

共 18 条

[1] EVALUATED BIMOLECULAR ION-MOLECULE GAS-PHASE KINETICS OF POSITIVE-IONS FOR USE IN MODELING PLANETARY-ATMOSPHERES, COMETARY COMAE, AND INTERSTELLAR CLOUDS [J].