Ambient air measurements of six bifunctional carbonyls in a suburban area
Ambient air measurements of six bifunctional carbonyls in a suburban area
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DOI：
10.1016/j.atmosres.2006.02.025
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发表时间：
2006-12
影响因子：
5.5
通讯作者：
R. Ortiz;Hiroyuki Hagino;K. Sekiguchi;Qingyue Wang;K. Sakamoto
中科院分区：
文献类型：
--
作者：
R. Ortiz;Hiroyuki Hagino;K. Sekiguchi;Qingyue Wang;K. Sakamoto
低分子量羰基化合物是大气中光化学反应产生的，存在于机动车尾气中，最近引起了研究人员的注意，因为其中一些化合物被怀疑是致癌物或诱变剂。六个双官能羰基化合物的检测和测量在郊区网站西北30公里的东京都市区。在2003年8月2日至8月11日的五个晴天，采用低容量扩散管和三过滤器串联系统，使用O-（2，3，4，5，6-五氟苄基）羟胺（PFBHA）作为吸附剂。采用气相色谱-质谱联用技术，对PFBHA和N，O-双（三甲基硅基）-三氟乙酰胺（BSTFA）衍生化后的双官能团羰基化合物进行了测定。平均总浓度（气体加颗粒）为：棕榈酸162.8 ng m− 3，甲基乙二醛113.7 ng m− 3，乙醇醛36.0 ng m− 3，乙二醛58.6 ng m− 3。
Low-molecular-weight carbonyl compounds, generated by photochemical reactions in the atmosphere and found in the exhaust of motor vehicles, have recently come to the attention of researchers because some of them are suspected carcinogens or mutagens. Six bifunctional carbonyl compounds were detected and measured in a suburban site 30 km northwest of the Tokyo metropolitan area. Samples were taken on five sunny days between 2 August and 11 August 2003 with a low-volume denuder and three-filter tandem system using O-(2,3,4,5,6-pentafluorobenzyl)hydroxylamine (PFBHA) as a sorbent. Bifunctional carbonyls were measured by gas chromatography–mass spectrometry after two derivatization processes with PFBHA and N,O-bis(trimethylsilyl)-trifluoroacetamide (BSTFA). The average total (gas plus particle) concentrations were 162.8 ng m−3for pyruvic acid, 113.7 ng m−3for methylglyoxal, 36.0 ng m−3for glycolaldehyde and 58.6 ng m−3for glyoxal.