[医]阶式取样器;
Airborne particles were collected from urban areas of Beijing and Tianjin using an FA-3 aerosol cascade sampler in summer 2002. Organochlorine pesticides residues in various size fractions of the samples were measured.
采用FA-3型气溶胶粒度分布采样器采样,对北京和天津2个样点夏季大气中不同粒径颗粒物上有机氯农药残留量进行分析。
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