Diffusive air sampling of reactive compounds. A review

Abstract

Methods for diffusive sampling of reactive compounds in air are reviewed. Sampler types include sorbent, liquid and filter samplers. The most versatile sampler for reactive compounds is the filter sampler, where reactive compounds are trapped on a reagent-coated filter. Applications are described for the sampling of reactive organics and inorganics. Aldehydes can be sampled using a 2, 4-dinitrophenylhydrazine-coated filter, and amines with a filter coated with 1-naphthyl isothiocyanate. The derivatives formed are determined by high-performance liquid chromatography with ultraviolet detection. Inorganics such as ozone and nitrogen oxides can also be determined with the filter sampler technique.