Zhao Ya-Nan, Wang Yue-Si, Wen Tian-Xue, Liu Quan
Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China.
Huan Jing Ke Xue. 2013 Apr;34(4):1232-5.
To study the characteristics and source of aerosol in the background region of the Pearl River Delta, PM2.5 samples were collected with a high volume sampler from Jan. 2007 to Dec. 2008 at Dinghu Mountain. Water-soluble ions in PM2.5 were analyzed by ion chromatography (IC). The results showed that the annual concentrations of total water-soluble ions was (36.3 +/- 16.4) microg x m(-3) The three major ions SO4(2-), NH4(+) and NO3(-), accounted for 89% of the total water-soluble ions. The correction of Na+ and Cl- was significantly enhanced in summer by the marine air mass, and the correlation coefficient R2 was 0.91. The mean value of NO3(-)/SO(2-) was 0.32, indicating that stationary sources had more contributions to Dinghu Mountain. The range of sigma cation/ sigma anion was 0.44 - 2.59, with a mean of 1.03 in PM2.5. The charge of water-soluble ions almost achieved balance in PM2.5
为研究珠江三角洲背景区域气溶胶的特征与来源，于2007年1月至2008年12月在鼎湖山使用大容量采样器采集了PM2.5样本。采用离子色谱法（IC）分析了PM2.5中的水溶性离子。结果表明，水溶性离子的年浓度为（36.3±16.4）μg×m(-3)。三种主要离子SO4(2-)、NH4(+)和NO3(-)占水溶性离子总量的89%。夏季海洋气团使Na+和Cl-的校正显著增强，相关系数R2为0.91。NO3(-)/SO(2-)的平均值为0.32，表明固定源对鼎湖山的贡献更大。PM2.5中σ阳离子/σ阴离子的范围为0.44 - 2.59，平均值为1.03。PM2.5中水溶性离子的电荷几乎达到平衡
