2-Nitrofluoranthene, 1-, 2- and 4-Nitropyrenes and 6-Nitrochrysene in Diesel-Engine Exhaust and Airborne Particulates
2-Nitrofluoranthene, 1-, 2- and 4-Nitropyrenes and 6-Nitrochrysene in Diesel-Engine Exhaust and Airborne Particulates
复制标题
柴油发动机废气和空气中颗粒物中的 2-硝基荧蒽、1-、2- 和 4-硝基芘以及 6-硝基芘
DOI：
10.1248/jhs.45.244
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发表时间：
1999
影响因子：
--
通讯作者：
K. Hayakawa
中科院分区：
文献类型：
--
作者：
T. Murahashi;R. Kizu;H. Kakimoto;A. Toriba;K. Hayakawa
采用高效液相色谱-化学发光检测法对市区和郊区柴油车尾气和大气颗粒物进行了检测，测定了苯-乙醇提取物中的5种致突变性硝基芳烃(2-硝基氟蒽（NF）、1-、2-和4-硝基芘（NPs）和6-硝基芘（NC）。柴油发动机排气颗粒物中检测到1-、4-NPs和6-NC，但未检测到2-NF和2-NP。另一方面，所有五种硝基芳烃都是在空气微粒中发现的。中心城区4-NP和6-NC的日浓度变化规律与1-NP相似，而2-NF和2-NP的日浓度变化规律与1-NP不同。这些结果有力地表明2-NF和2-NP是在大气中形成的。5种硝基芳烃中，2-NF的郊区/市中心浓度比最大。2- np、4- np和6-NC的比值均大于1-NP。这些结果表明，2-NF和2-NP在大气中形成，而4-NP和6-NC的次生形成尚不清楚。综合考虑致突变活性和大气浓度，估计2-NF在市区的致突变贡献与1-NP相当，在郊区的致突变贡献大于1-NP。这一结果表明，在城市空气中形成的微量硝基芳烃的诱变作用可能不可忽略。
Diesel-engine exhaust and airborne particulates were collected in downtown and suburban areas and five mutagenic nitroarenes (2-nitrofluoranthene (NF), 1-, 2- and 4-nitropyrenes (NPs) and 6-nitrochrysene (NC) in benzene-ethanol extracts were determined by high-performance liquid chromatography with chemiluminescence detection. 1- and 4-NPs and 6-NC were found in diesel-engine exhaust particulates, however, 2-NF and 2-NP were not detected. On the other hand, all five nitroarenes were found in airborne particulates. Diurnal concentration patterns of 4-NP and 6-NC in the downtown area were similar to the pattern of 1-NP, but the patterns of 2-NF and 2-NP were different from the pattern of 1-NP. These results strongly suggested that 2-NF and 2-NP are formed in the atmosphere. Of the five nitroarenes, 2-NF had the largest suburban / downtown concentration ratio. 2- and 4-NPs and 6-NC all showed larger ratios than did 1-NP. These results showed that 2-NF and 2-NP were formed in the atmosphere, but that the secondary formation of 4-NP and 6-NC were not known. Taking mutagenic activity and the atmospheric concentration into consideration, the mutagenic contribution of 2-NF was estimated to be comparable with that of 1-NP in the downtown area, and more than that of 1-NP in the suburban area. This result suggested that the mutagenic contribution of the minor nitroarenes formed in urban air might not be negligible.