Carboxylic acids in secondary aerosols from oxidation of cyclic monoterpenes by ozone
Carboxylic acids in secondary aerosols from oxidation of cyclic monoterpenes by ozone
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DOI：
10.1021/es990445r
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发表时间：
2000-03-15
影响因子：
11.4
通讯作者：
Larsen, BR
中科院分区：
文献类型：
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作者：
Glasius, M;Lahaniati, M;Larsen, BR
在烟雾箱中进行了臭氧氧化五种环单萜的实验研究。通过GC-MS和HPLC-MS分析了形成的二次气溶胶的非挥发性极性氧化产物，重点是羧酸的鉴定。在对应于低百分比摩尔产率的浓度水平下测定三类化合物：即二羧酸、氧代羧酸和羟基酮基羧酸。羧酸是高极性的，并且具有比其相应的醛更低的蒸气压，因此可能在二次有机气溶胶形成过程中起重要作用。最丰富的羧酸如下：顺式-蒎酸AB 1（顺式-3-羧基-2，2-二甲基环丁基乙酸），由α-和β-蒎烯制得;顺式-蒎酮酸A3（顺式-3-乙酰基-2，2-二甲基环丁基乙酸）和顺式-10-羟基嘌呤酸AB 6（顺式-2，2-二甲基-3-羟基乙酰基环丁基乙酸）;顺式-3-癸酸C1（cis-2，2-dimethyl-1，3-cyclopropyldiethanoic acid），cis-3-caronic acid C3（2，2-二甲基-3-（2-氧代丙基）环丙基乙酸）和顺式-10-羟基-3-羧酸C6（顺式-2，2-二甲基-3-（羟基-2-氧代丙基）环丙基乙酸）从3-<$烯;顺式-桧酸S1（顺式-2-羧基-1-异丙基环丙基乙酸）来自桧烯;柠檬酸L1（3-异丙烯基己二酸），柠檬酸L3（3-异丙烯基-6-氧代-庚酸），7-羟基柠檬酸L 6（3-异丙烯基-7-羟基-6-氧代庚酸）和来自柠檬烯的7-羟基柠檬酸L 6 '（7-羟基-3-异丙烯基-6-氧代庚酸）。
A series of smog chamber experiments have been conducted in which five cyclic monoterpenes were oxidized by ozone. The evolved secondary aerosol was analyzed by GC-MS and HPLC-MS for nonvolatile polar oxidation products with emphasis on the identification of carboxylic acids. Three classes of compounds were determined at concentration levels corresponding to low percentage molar yields: i.e. dicarboxylic acids, oxocarboxylic acids, and hydroxyketocarboxylic acids. Carboxylic acids are highly polar and have lower vapor pressures than their corresponding aldehydes and may thus play an important role in secondary organic aerosol formation processes. The most abundant carboxylic acids were the following: cis-pinic acid AB1 (cis-3-carboxy-2,2-dimethylcyclobutylethanoic acid) from alpha- and beta-pinene; cis-pinonic acid A3 (cis-3-acetyl-2,2-dimethylcyclobutylethanoic acid) and cis-10-hydroxypinonic acid AB6 (cis-2,2-dimethyl-3-hydroxyacetylcyclobutylethanoic acid) from alpha-pinene and beta-pinene; cis-3-caric acid C1 (cis-2,2-dimethyl-1,3-cyclopropyldiethanoic acid), cis-3-caronic acid C3 (2,2-dimethyl-3-(2-oxopropyl)cyclopropanylethanoic acid), and cis-10-hydroxy-3-caronic acid C6 (cis-2,2-dimethyl-3-(hydroxy-2-oxopropyl)cyclopropanylethanoic acid) from 3-carene; cis-sabinic acid S1 (cis-2-carboxy-1-isopropylcyclopropylethanoic acid)from sabinene; limonic acid L1 (3-isopropenylhexanedioic acid), limononic acid L3 (3-isopropenyl-6-oxo-heptanoic acid), 7-hydroxylimononic acid L6 (3-isopropenyl-7-hydroxy-6-oxoheptanoic acid), and 7-hydroxylimononic acid L6' (7-hydroxy-3-isopropenyl-6-oxoheptanoic acid) from limonene.