摘 要 ：为评价环境湿度变化对TEOM® 1400a 系列环境颗粒物监 测仪进行PM₁₀ 观测的影响，在2004 年1 月到2005 年1 月的观测过 程中，获得了30 mi n 平均的大气PM₁₀ 质量浓度，并观测了地面气 象条件及降水过程中仪器的响应。结果表明, 湿度变化较大时仪器 记录的 PM10 浓度明显受到滤膜上吸附的水汽含量变化的影响。仪 器提供的PM₁₀ 质量浓度反映出明显的日变化规律，分别在8:00~9: 30和18:00~ 23:00 出现峰值而在12:00~15:30出现谷值；此变化规律 反映了大气污染物的日变化特征，但也受到空气湿度变化的影响。 应用该仪器时对空气湿度的影响应当予以考虑。 

关键词: 大气颗粒物；PM_{1 0} 质量浓度；湿度

Abstract:The 30-minute average atmospheric PM₁₀concentration was observed during Jul, 2004 to Jan, 2005 to evaluate the air humidity influence on application of TEOM series 1400a ambient particulate monitor in PM₁₀ measurement. The meteorological conditions near the surface, and the response of the monitor during precipitation course were also observed. The results indicated that PM₁₀ mass con centration reported by the monitor was influenced significantly by the change of absorbed moisture content on the filter when ambient humidity varied greatly. The PM₁₀concentration reported by the moni tor shows obviously the daily variability, that is, peak values emerge during 8:00-9:30 and 18:00-23:00, while minimum value emerges dur ing 12:00-15:30. This characteristic is corresponding with daily vari ability of atmospheric pollutant. The changing pattern of PM₁₀ mass concntration is also influenced by the air humidity which should be considered when using this monitor.

Keywords: atmospheric particulate; PM₁₀ mass concentration; humidity