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Concentration and chemical composition of PM2.5 in Shanghai for a 1-year period

机译：上海市一年中PM2.5的浓度和化学成分

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Weekly PM2.5 samples were collected in Shanghai, China at two sites, Tongji University and Hainan Road. Sampling started in March 1999 and was conducted for 1 year. The ambient mass concentration and chemical composition of the PM2.5 were determined. Chemical analyses included elemental composition, water-soluble ions, and organic and elemental carbon. Weekly PM2.5 mass concentrations ranged from 21 to 147 mug/m(3), with annual average concentrations of 57.9 and 61.4 mug/m(3) at the two sites, respectively. Seasonal variation Of PM2.5 concentrations was significant, with the highest concentrations observed from mid-November through December and the lowest from June through September. Ammonium sulfate and nitrate accounted for 41.6% of the PM2.5 mass with sulfate alone accounting for 23.4% of the PM2.5 mass. Carbonaceous material accounted for 41.4% of the PM2.5 mass, with 73% of that mass being organic, as defined by the TOR analysis method. Crustal components averaged 9.6% of the PM2.5 mass. Potassium, which was 95% water soluble, accounted for 2.7% of the PM2.5 mass. (C) 2002 Elsevier Science Ltd. All rights reserved. [References: 29]
机译：每周在中国上海的同济大学和海南路两个地点采集PM2.5样品。采样从1999年3月开始，进行了1年。测定了PM2.5的环境质量浓度和化学组成。化学分析包括元素组成，水溶性离子以及有机和元素碳。每周PM2.5的质量浓度范围从21到147马克杯/米3（3），这两个地点的年平均浓度分别为57.9和61.4马克杯/米3（3）。 PM2.5浓度存在季节性变化，从11月中旬至12月观察到最高浓度，6月至9月观察到最低浓度。硫酸铵和硝酸盐占PM2.5质量的41.6％，仅硫酸盐占PM2.5质量的23.4％。根据TOR分析方法的定义，碳质材料占PM2.5质量的41.4％，其中73％是有机的。地壳成分平均占PM2.5质量的9.6％。水溶性为95％的钾占PM2.5质量的2.7％。 （C）2002 Elsevier Science Ltd.保留所有权利。 [参考：29]

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