Determination of small dialkyl organophosphonates at microgram/l concentrations in contaminated groundwaters using multiple extraction membrane disks
- Oak Ridge National Lab., TN (United States)
- Parkdale High School, Riverdale, MD (United States)
Di-isopropyl methylphosphonate (DIMP) and dimethyl methylphosphonate (DMMP) are byproducts and surrogates for Sarin (GB) and VX; they are readily quantitated at {mu}g/L concentrations in groundwaters. Liter aqueous samples are fortified with triethylphosphate, then passed through a sandwich of 3 preconditioned extraction disks: glass fiber filter to remove particulates, C{sub 18}-based extraction disk to collect DIMP, and carbon-based extraction disk to collect DMMP. The two extraction disks are dried and extracted with MeOH. After the extract is fortified with with diethyl ethylphosphonate internal standard, it is analyzed using a gas chromatograph with a nitrogen- phosphorus detector. When the pump and treat criterion is used, detection limits for DMMP and DIMP are 2 {mu}g/L. Method recovery is 40-50%, based on synthetic groundwaters containing 0.2-50 {mu}g/L of each analyte. DIMP and DMMP are cleanly resolved.
- Research Organization:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Sponsoring Organization:
- USDOE Office of Energy Research, Washington, DC (United States)
- DOE Contract Number:
- AC05-96OR22464
- OSTI ID:
- 434414
- Report Number(s):
- CONF-960826-2; ON: DE97001294
- Resource Relation:
- Conference: 11. international congress on thermal analysis and calorimetry, Philadelphia, PA (United States), 12-16 Aug 1996; Other Information: PBD: [1996]
- Country of Publication:
- United States
- Language:
- English
Similar Records
Extraction of Chemical Impurities for Forensic Investigations: A Case Study for Indoor Releases of a Sarin Surrogate
Sorption and Desorption Study of a Nerve-Agent Simulant from Office Materials for Forensic Applications