https://orcid.org/0000-0002-8473-1024
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Abstract
The degradation of organophosphorus compounds CVX [O-butyl S-(2-diethylaminoethyl)methylphosphonothioate] and RVX [O-isobutyl S-(2-diethylaminoethyl)methylphosphonothioate] in soils is described. The work included the determination of the extraction efficiency of different types of soil matrices with respect to time for these organophosphorus substances. Extraction of the contaminant from the soil achieved the highest yields using dichloromethane. The most significant decreases of both RVX and CVX were recorded within the first 24 h, while the total decrease of the analytes in the studied soils varied significantly according to their composition. Gas chromatography–mass spectrometry was used to determine the extraction efficiency of organophosphorus substances from soil matrices. The proposed method presented excellent linearity for RVX and CVX calibration curves with correlation coefficients exceeding 0.99. To increase the sensitivity, selected ion monitoring with a limited mass-to-charge ratio range was employed to characterize the extraction efficiency.