Vapor-phase modification particles

Until the early to mid-1980s, research on the mutagenicity of respirable POM focused almost exclusively on the particulate phase. Another aspect of tropospheric chemistry with significant health implications is the application of the Ames bacterial assay (with or without the microsuspension modification) to the detection and identification of mutagenic vapor-phase PAHs and PACs. For example, Harger and co-workers (1992) reported that the mutagenicities of concurrently collected samples of vapor-phase and particle-phase organics in southern California (Claremont, California) ambient air were comparable. 

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