DIFFUSIVE AIR SAMPLING OF REACTIVE COMPOUNDS - A REVIEW

Methods for diffusive sampling of reactive compounds in air are review ed. Sampler types include sorbent, liquid and filter samplers. The mos t versatile sampler for reactive compounds is the filter sampler, wher e reactive compounds are trapped on a reagent-coated filter. Applicati ons are described for the sampling of reactive organics and inorganics . Aldehydes can be sampled using a 2,4-dinitrophenylhydrazine-coated f ilter, and amines with a filter coated with 1-naphthyl isothiocyanate. The derivatives formed are determined by high-performance liquid chro matography with ultraviolet detection. Inorganics such as ozone and ni trogen oxides can also be determined with the filter sampler technique .