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环境科学学报 1998
DESIGN OF AN ANNULAR DENUDER/CASCADE IMPACTOR SYSTEM AND MEASUREMENT OF ACIDITY OF FINE PARTICLES
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Abstract:
An annular denuder/cascade impactor system was designed and evaluated for the first time in China to study aerosol acidity. Laboratory tests and field mesurements showed a good performance of the system, capable of avoiding interference of basic gases, such as NH 3 , with acid aerosols during sampling. The acidity of fine particles was measured in nine sites of China.