Abstract
Fine particles in urban environments contain substantial quantities of material that can be lost from the particles during sample collection on a filter. This materials include ammonium nitrate and semivolatile organic compounds. Methods for the accurate determination of these species in integrated samples have been developed using diffusion denuder samplers. However, it is often desirable to determine fine particulate matter on a continuous basis. The real-time ambient mass sampler (RAMS), a continuous monitor using diffusion denuder and tapered element oscillating microbalance (TEOM) technologies, has been evaluated by monitoring fine particulate species in Riverside, CA during August and September, 1997, and in Bakersfield, CA during February and March, 1998. The results are compared to measurements made in 1 h integrated samples in Riverside and in 2 h integrated samples in Bakersfield with a diffusion denuder sampler, the particle concentrator-Brigham Young University organic sampling system (PC-BOSS...
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