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环境化学  2015 

广州大气气溶胶总悬浮颗粒物(TSP)中的有机示踪化合物

Keywords: 广州,有机示踪化合物,糖类化合物,藿烷类化合物,胆甾醇

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Abstract:

为了解广州市气溶胶中有机示踪化合物的分布特征,采用N,O-双(三甲基硅烷基)三氟乙酰胺(BSTFA)衍生化预处理技术和GC/MS分析技术,于2002—2003年对广州市大气气溶胶中的有机示踪化合物进行了定性和定量分析.结果表明,脱水糖类、β-谷甾醇、脱氢松香酸主要来源于生物质燃烧;葡萄糖、果糖、蔗糖、海藻糖等主要来源于土壤的再悬浮;藿烷类、甾烷类化合物主要来源于化石燃料的燃烧;胆甾醇可以作为肉类烹饪等餐饮源的有机示踪物.广州市大气中所检测到的所有糖类化合物与植物蜡的浓度比值春、秋两季较高,这可能与春天是植物叶片扩张和耕耘播种的季节、秋天是果实成熟和农作物收割的季节有关.

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