Abstract |
A study of the concentrations of lead in the atmospheres of Cincinnati, Los Angeles, and Philadelphia was conducted jointly by industrial, State, Federal, and university groups during the period June 1961 through May 1962. In each city, from four to eight sampling stations, representing four geographical and land-use classifications (rural, residential, commercial, and industrial) were operated continuously with membrane filter samplers. In addition, at one station of each classification in each city, diurnal variations were investigated by use of sequential tape samplers. In each city samples of blood and urine were obtained from selected groups of residents and examined for concentrations of lead. All samples were analyzed by the dithizone method. Approximately 3,400 samples of particulate lead from the atmosphere were obtained, and the concentrations of lead in blood of approximately 2,300 individuals and of lead in urine of 1,700 males were determined. Details of the study and the results obtained are reported. (Author) |