Tetraalkyl lead in the urban atmosphere of Glasgow

Abstract
Measurements of tetraalkyl lead (TAL) and particulate lead in the atmosphere were made at various sites in Glasgow. Near central Glasgow the average 24‐hour TAL concentration was 32 ng m−3, maximum 77 ng m−3, with a mean TAL/total lead ratio of 6.3%. The daytime TAL content, maximum 144 ng m−3, greatly exceeded overnight levels. The urban concentrations of both TAL and particulate lead declined with increasing altitude, exhibiting mean decreases of 29% and 36% respectively between 3m and 12m above street level. At a rural site, 24‐hour TAL levels averaged only 3.9 ng m−3.