Determination of small dialkyl organophosphonates at microgram/l concentrations in contaminated groundwaters using multiple extraction membrane disks

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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 ... continued below

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28 p.

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Tomkins, B.A.; Griest, W.H. & Hearle, D.R. December 31, 1996.

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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.

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28 p.

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OSTI as DE97001294

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  • 11. international congress on thermal analysis and calorimetry, Philadelphia, PA (United States), 12-16 Aug 1996

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  • Other: DE97001294
  • Report No.: CONF-960826--2
  • Grant Number: AC05-96OR22464
  • Office of Scientific & Technical Information Report Number: 434414
  • Archival Resource Key: ark:/67531/metadc682555

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  • December 31, 1996

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  • July 25, 2015, 2:20 a.m.

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  • Jan. 25, 2016, 6:51 p.m.

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Tomkins, B.A.; Griest, W.H. & Hearle, D.R. Determination of small dialkyl organophosphonates at microgram/l concentrations in contaminated groundwaters using multiple extraction membrane disks, article, December 31, 1996; Tennessee. (digital.library.unt.edu/ark:/67531/metadc682555/: accessed September 20, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.