Abstract
A method of analysis for the measurement of organic lead compounds in urban air is described. Levels of organic lead as low as 0.003 μg m
−3 may be measured by sampling 0.06 m
3 of air over a period of 30–40 min. Concentrations of organic lead and particulate lead have been measured at several sites in the London area. The results obtained are compared with those of other workers and discussed in relation to the various sources of organic lead compounds in air.