Duan Fengkui, Liu Xiande, He Kebin, Dong Shuping
Department of Environmental Science and Engineering, Tsinghua University, Beijing, People's Republic of China.
Bull Environ Contam Toxicol. 2009 Mar;82(3):332-7. doi: 10.1007/s00128-008-9560-0. Epub 2008 Sep 20.
The total nitrogen (TN) and water-soluble nitrogenous ions were determined by using CHN Elemental Analyzer and ion chromatography method, respectively, from November 24, 1998 to February 12, 1999 in Beijing. The average concentrations of TN, NH(4) (+) and NO(3) (-) were 10.62 microg N m(-3), 6.67 microg m(-3) and 10.01 microg m(-3), respectively. The total inorganic nitrogen (IN) calculated from NH(4) (+) and NO(3) (-) was 7.45 microg N m(-3), accounting for 70% of TN, i.e., 30% of TN existed as organic nitrogen form (ON). The correlation between ON and other pollution tracers showed that, coal combustion, biomass burning, soil humic matter and secondary formation were the important sources of ON in particulate matter in Beijing.
1998年11月24日至1999年2月12日期间，在北京分别使用CHN元素分析仪和离子色谱法测定了总氮（TN）和水溶性含氮离子。TN、NH(4) (+)和NO(3) (-)的平均浓度分别为10.62微克氮/立方米、6.67微克/立方米和10.01微克/立方米。由NH(4) (+)和NO(3) (-)计算得出的总无机氮（IN）为7.45微克氮/立方米，占TN的70%，即30%的TN以有机氮形式（ON）存在。ON与其他污染示踪剂之间的相关性表明，煤炭燃烧、生物质燃烧、土壤腐殖质和二次形成是北京颗粒物中ON的重要来源。
