Abstract
A method has been developed for the determination of trace concentrations of iron(III) dimethyldithiocarbamate (ferbam) and its three degradation products (thiram or TMTD, tetramethylthiuram disulphide; TMTM, tetramethylthiuram monosulphide; and TMTU, tetramethylthiourea) in model mixtures and real samples. Quantitative analysis using adsorption and reversed-phase chromatography enables reproducible results to be achieved of in the high-performance liquid chromatographic separation of these compounds in a very short time. All results were verified by mass spectrometry. The limit of detection for thiram in soil was 0.005 mg/kg, which corresponds with the criteria of the FAO (Codex Alimentus) concerning methods for the determination of dithiocarbamate residues in food.
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