Atmospheric speciation and wet deposition of alkyllead compounds

Concentrations of individual tetra-, tri-, and dialkyllead compounds have been measured in the gas phase and in aerosol and rainwater samples at two sites in eastern England and at one site in western Ireland. The results show a predominance of gas-phase over aerosol-associated species in the air at all sites, and in general a greater abundance of tetraalkyllead than trialkyllead. Washout factors for total alkyllead are lower than for inorganic lead and correlate highly between adjacent urban and semirural sites.