Supercritical fluid extraction and organic solvent microextraction of chemical agent simulants from soil

Conference · Tue Dec 31 00:00:00 EST 1991

OSTI ID:10107883

Griest, W H; Ramsey, R S; Ho, C h; Caldwell, W M

Experiments with chemical warfare agent simulants suggest that supercritical fluid extraction can achieve good extraction recoveries of agents in soil and produce less laboratory waste than current organic solvent extraction methods. Two-ppm spikes in 1 g of Rocky Mountain Arsenal Standard Soil were extracted using 5% methanol in carbon dioxide at 300 atm for 2 min at 60{degrees}C. Recoveries (n=3) were 79{plus_minus}23% for dimethylmethylphosphonate, 93{plus_minus}14% for 2-chlorethylethylsulfide, 92{plus_minus}13% for diisopropylfluorophosphate, and 95{plus_minus}17% for diisopropylmethylphosphonate. A 5 min ultrasonic micro-scale extraction using methanol is more reproducible but less efficient.

• Research Organization: Oak Ridge National Lab., TN (United States)
• Sponsoring Organization: Department of Defense, Washington, DC (United States)
• DOE Contract Number: AC05-84OR21400
• OSTI ID: 10107883
• Report Number(s): CONF-9111158-1; ON: DE92004442; CNN: Contract IAG 1989-C110-A1
• Resource Relation: Conference: 1991 U.S. Army chemical research conference on chemical defense,Aberdeen Proving Ground, MD (United States),19-22 Nov 1991; Other Information: PBD: [1991]
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
PHOSPHONATES
SUPERCRITICAL GAS EXTRACTION
ORGANIC CHLORINE COMPOUNDS
SULFIDES
CHEMICAL WARFARE AGENTS
POLLUTION CONTROL
LAND POLLUTION
SOILS
SOLVENT EXTRACTION
540220
400105
CHEMICALS MONITORING AND TRANSPORT
SEPARATION PROCEDURES