Methods for the simultaneous collection of air vapors and particles were described. The OSHA sampler employing a glass tube containing two beds of XAD-2 sorbent for the determination of organophosphorus pesticides in both the particle and vapor phases was described. The determination of fluoride (16984488) in occupational settings was presented as another example in which sampling of both vapors and aerosols was necessary. For this application a dual filter cassette sampler containing an untreated as well as an alkaline impregnated filter was used. Another sampler was described which employed a polyvinyl-chloride filter unit followed by two impingers in series containing aqueous solutions of sodium-hydrogen-sulfite which was used to discriminate between particle bound and vapor phase formaldehyde (50000). Different methods for sampling isocyanates in air were reviewed and evaluated and a recent dual filter method employing an uncoated polytetrafluoroethylene filter and a glass fiber filter impregnated with 9-(methylaminomethyl)anthracene was described.
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