Revision of a field method for the determination of total airborne lead

Abstract

An improved field method is described for determination airborne lead at concentrations up to 0·8 mg m^–3 of lead. After collection on a filter the lead is dissolved in acid and complexed with dithizone. The lead dithizonate is extracted into 1,1,1-trichloroethane and the colour intensity of the complex is compared visually with standards. The apparatus used is simple to operate and the time required for a complete determination is about 15 minutes.