[Environmental and biologic monitoring of atrazine exposure at a formulating plant]

Atrazine exposure was evaluated in three workers engaged in technical Atrazine dust formulating and bagging processes, by environmental and biological monitoring. We found an Atrazine concentration in breathing area of 31.2 micrograms/m3 (SD +/- 9.9); actual inhalatory absorption was 20.7 micrograms/workshift. Cutaneous amount was 6 mg per workshift and the largest fraction was found on hands. Supposing that only 3.5% of the applied was absorbed, 239.7 micrograms of Atrazine were taken up by skin per workshift. The dealkylated metabolites and parent compound excreted in urine, as a whole, accounted for 71.09% of the presumed total dose absorbed. The spectrum or the urinary Atrazine metabolites comprised bi-dealkylated (58%), deethylated (30.7%), deisopropylated (7.7%) and unmodified Atrazine (3.6%). About 31% of the amount is excreted during the workshift itself. These findings allow to evaluate the magnitude of the real doses absorbed, keeping into account the effect of protective means.