Adopting the classification sampling equipments,the Hg of different diameters particles collected from three different functional areas in summer and winter in Huhhot were analyzed.

• 采用分级采样装置,于冬夏两季采集呼市三个不同功能区不同粒径空气颗粒物中的汞进行分析,结果表明:呼市空气颗粒物中的汞含量冬季明显高于夏季;