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Occupational Medicine 1991;41:107-112
© 1991 Society of Occupational Medicine

research-article

Environmental and Biological Monitoring of Workers Exposed to Inorganic Lead

J. DE MEDINILLA and M. ESPIGARES

Centro de Seguridad e Higiene en el Trabajo Granada, Spain
Departamento de Salud Pública, Universidad de Granada Spain

A total of 20 workers who were exposed to inorganic lead in two local firms (M and N) were studied. Lead concentrations in the air (PbA) at firm M exceeded the threshold limit value (TLV) of 0.150 mg/m3 established by Spanish and EC legislation, while atmospheric lead at firm N exceeded the action level of 0.075 mg/m3. In the same population, biological exposure indices (BEI) were also determined; these included lead in whole blood (PbB), erythrocyte activity of aminolevulinic acid (ALA-D), urinary excretion of aminolevulinic acid (ALA-U) and zinc protoporphyrin (ZPP). The relationship between the exposure parameters (PbA, PbB) and the biological activity indices (ALA-D, ALA-U, ZPP) were analysed statistically in order to obtain levels of significance, coefficients of correlation and regression equations. The high coefficients of correlation found confirm the usefulness of BEI in evaluating exposure to lead fumes and lead dust.

Requests for reprints should be addressed to: Dr J. De Medinilla, Centro de Seguridad e Higiene en el Trabajo, Apto. 276, Armilla, Granada, Spain


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