Carboxylic Acids in Secondary Aerosols from Oxidation of Cyclic Monoterpenes by Ozone
作者:Marianne Glasius、Maria Lahaniati、Aggelos Calogirou、Dario Di Bella、Niels R. Jensen、Jens Hjorth、Dimitrios Kotzias、Bo R. Larsen
DOI:10.1021/es990445r
日期:2000.3.1
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 α- and β-pinene; cis-pinonic acid A3 (cis-3-acetyl-2,2-dimethylcyclobutylethanoic acid)
已经进行了一系列烟雾室实验,其中五种环状单萜被臭氧氧化。通过 GC-MS 和 HPLC-MS 分析释放的二次气溶胶中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了三类化合物:即二羧酸、氧代羧酸和羟基酮羧酸。羧酸具有高极性,并且比其相应的醛具有更低的蒸气压,因此可能在二次有机气溶胶形成过程中发挥重要作用。最丰富的羧酸如下:来自α-和β-蒎烯的顺式松香酸AB1(顺式-3-羧基-2,2-二甲基环丁基乙酸);cis-pinonic acid A3 (cis-3-acetyl-2, 来自α-蒎烯和β-蒎烯的2-二甲基环丁基乙酸)和顺-10-羟基松香酸AB6(顺-2,2-二甲基-3-羟基乙酰环丁基乙酸);cis-3-caric acid C1 (ci...