Extraction of explosives from soil followed by gas chromatography-mass spectrometry analysis with negative chemical ionization.
A new, simple and accurate method for extraction of explosives from soil was developed and validated. The method includes one hour gentle extraction of compounds from soil in acetonitrile:dichloromethane 50:50 at 30°C. Further analysis was made with GC-MS using cool on-column injection and negative chemical ionization. The method increased the recovery of the more volatile products, generated higher accuracy and was extensively time-saving compared to the conventional EPA (US Environmental Protection Agency) 8330 method. Applications are demonstrated on commercial reference materials.
FOI, Swedish Defence Research Agency, Department of Energetic Materials, S-147 25 Tumba, Sweden. erik.holmgren@foi.se
Erik
E
Holmgren
Stefan
S
Ek
Anders
A
Colmsjö
D000097:Acetonitriles; D053834:Explosive Agents / Q000032:analysis* / Q000302:isolation & purification; D008401:Gas Chromatography-Mass Spectrometry / Q000379:methods*; D057230:Limit of Detection; D059625:Liquid-Liquid Extraction / Q000379:methods*; D008752:Methylene Chloride; D015203:Reproducibility of Results; D012987:Soil / Q000032:analysis*; D013696:Temperature
D000097:Acetonitriles; D053834:Explosive Agents; D012987:Soil; D008752:Methylene Chloride; C032159:acetonitrile