Fig. 4From: Identification of acidic degradation products of chemical warfare agents by methylation with trimethylsilyldiazomethane and gas chromatography–mass spectrometryRecovery (%) of APAs (10 μg/ml) and DEAESA in different water samples and in a clay extract. The solution was evaporated to dryness, and the residue was dissolved in AcMeOH before TMSDAM methylationBack to article page