Fig. 5From: Identification of acidic degradation products of chemical warfare agents by methylation with trimethylsilyldiazomethane and gas chromatography–mass spectrometryGC–MS TICs of non-cation-exchanged water samples and clay extract. TMSDAM was used for methylation of a tap water sample (A) and a clay soil extract (B). Retention time window during which the DEAESA derivative elutes for a tap water sample (C), a PT water sample (D), a seawater sample (E) and a clay soil extract (F). A DBWaxetr column was usedBack to article page