Biomonitoring of arylamines: hemoglobin adducts of urea and carbamate pestides

Publisher Website
Google Scholar
Abstract
Hemoglobin adducts of aromatic amines released from pesticides were investigated. Female Wistar rats were dosed orally with pesticides up to 1 mmol/kg body weight. Blood was obtained after 24 h, hemoglobin isolated and hydrolyzed in 1 N NaOH. The amines were extracted and quantified by gas chromatography with nitrogen-specific or mass-selective detection. The following binding indices [HBI, hemoglobin binding index = binding (mmol/mol Hb) per dose (mmol/kg)] were obtained: pesticide (arylamine): linuron, diuron (3,4-dichloroaniline) 0.8 and 4.5 respectively; monuron, monolinuron (4-chloroaniline) 39 and 55 respectively; chlor propham (3-chloroaniline) 2.9; chlordimeform (4-chloro-o-toluidine) 2.4; propham (aniline) 2.4. With vinclozoline and iprodione (3,5-dichloroaniline) and quintozene (pentachloro aniline) no adducts could be found. The results demonstrate the possible use of arylamine–hemoglobin adducts for measuring the bioavailability of potentially hazardous components of pesticides and the extent to which they are formed and metabolically activated.