The dispersity of 5 kinds of diesel particles were collected and detected by using high volume air sampler with DFG-1 meter, and 3 kinds of diesel exhaust particles were extracted and analysed.

• 利用DFJ－1型五码分级器对3种型号柴油机车排出颗粒物进行分级采样，并对此3型颗粒物进行有机提取物组分分析。