| Vapor-Phase Infrared Spectral Study of Weapons-Grade O-Ethyl S-2(diisopropylamino)ethyl methylphosphonothiolate (VX) |
May 2012 |
45 pages |
| Authors:
Barry R Williams; Melissa S Hulet; Alan C Samuels; Jr Miles Ronald W; SCIENCE APPLICATIONS INTERNATIONAL CORP GUNPOWDER MD
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 | We report the infrared spectra of weapons-grade 0-ethyl-S-2-(diisopropylamino)ethyl methylphosphonothiolate in the mid-infrared (4000-550/cm) region. The chemical used in the feedstock was obtained from a ton container and was analyzed by gas chromatography-mass spectrometry and nuclear magnetic resonance spectroscopy to determine its composition. Analysis of the data showed that the spectra were dominated by the volatile impurities in the VX, which were primarily acetone, 1,3-diisopropylcarbodiimide, and diisopropylamine. Concentrations of the compounds ... |
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| Evaluation of the AIRIS Standoff Hyperspectral Imaging System |
JAN 2011 |
26 pages |
| Authors:
Ronald W. Miles; Melissa S Hulet; Barry R. Williams; Rex K. Miyashiro; William J. Marinelli; ARMY EDGEWOOD CHEMICAL BIOLOGICAL CENTER APG MD RESEARCH AND TECHNOLOGY DIR
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| The ability of the AIRIS (Physical Sciences, Inc., Andover, MA) standoff sensor to detect chemical agents was examined in a series of laboratory measurements. Agents were passed through a flow cell, which was viewed against a blackbody that defined the thermal background. The cell was translated through the sensor's Held of regard to simulate the impact of cloud motion on detection capability. This experiment used agent column densities and background ... |
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| Vapor-Phase Absorptivity Coefficient of Ethyl N,N-Dimethylphosphoramidocyanidate |
Jan 2010 |
24 pages |
| Authors:
Barry R William; Melissa S Hulet; Alan C Samuels; Miles; Ronald W Jr; SCIENCE APPLICATIONS INTERNATIONAL CORP GUNPOWDER MD
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| We measured the vapor-phase absorptivity coefficient of the chemical warfare agent ethyl N,N-dimethylphosphoramidocyanidate (GA) in the mid-infrared (4000-550 cm') at a spectral resolution of 0.125 cm'. The GA used in the feedstock was purified by fractional distillation and analyzed by nuclear magnetic resonance and gas chromatography/mass spectrometry to verify its purity. We describe the experimental method used to acquire the individual spectra that were used to produce the composite spectrum, ... |
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| Vapor-Phase Infrared Absorptivity Coefficients of Three 2-(Dialkylamino)Ethanethiol Compounds |
Aug 2009 |
31 pages |
| Authors:
Barry R Williams; Melissa S Hulet; Alan C Samuels; Miles; Ronald W Jr; EDGEWOOD CHEMICAL BIOLOGICAL CENTER ABERDEEN PROVING GROUND MD
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| We measured the vapor-phase absorptivity coefficient of 2-(diisopropylamino)ethanethiol, 2-(diethylamino)- ethanethiol, and 2-(dimethylamino)ethanethiol in the mid-infrared (4000-550 cm(-1)) at a spectral resolution of 0.125 cm(-1). The material used in the feedstock was synthesized at the U.S. Army Edgewood Chemical Biological Center, and the purity was verified by gas chromatography and NMR spectroscopy. In this report, we describe the experimental method used to acquire the individual spectra that were used to produce ... |
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| Vapor-Phase Infrared Absorptivity Coefficient of Cyclohexyl Methylphosphonofluoridate |
Jul 2009 |
23 pages |
| Authors:
Alan C Samuels; Miles; Ronald W Jr; Barry R Williams; Melissa S Hulet; EDGEWOOD CHEMICAL BIOLOGICAL CENTER ABERDEEN PROVING GROUND MD RESEARCH AND TECHNOLOGY DIR
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| We measured the vapor-phase absorptivity coefficient of cyclohexyl methylphosphonofluoridate (GF), a chemical warfare agent, in the mid-infrared (4000-550/cm) at a spectral resolution of 0.125/cm. The GF used in the feedstock was purified by fractional distillation and analyzed by NMR and gas chromatography-mass spectrometry to verify its purity. In this report, we describe the experimental method used to acquire the individual spectra that produced the composite spectrum, summarize the statistical uncertainties ... |
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| Vapor-Phase Infrared Absorptivity Coefficient of Pinacolyl Methylphosphonofluoridate |
May-2009 |
23 pages |
| Authors:
Barry R Williams; Melissa S Hulet; Alan C Samuels; Miles; Ronald W Jr; EDGEWOOD CHEMICAL BIOLOGICAL CENTER ABERDEEN PROVING GROUND MD
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| We measured the vapor-phase absorptivity coefficient of pinacolyl methylphosphonofluoridate, a chemical warfare agent, (GD, Soman) in the mid-infrared (IR) (4000-550 cm') at a spectral resolution of 0.125 cm1. The GD used in the feedstock was purified by fractional distillation and analyzed by nuclear magnetic resonance, gas chromatography (GC)-mass spectrometry, and GC-IR to verify its purity. We describe the experimental method used to acquire the individual spectra that were used to ... |
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| Vapor-Phase Infrared Absorptivity Coefficient of O,S-Diethyl Methylphosphonothioate |
May 2009 |
26 pages |
| Authors:
Barry R Williams; Melissa S Hulet; Alan C Samuels; Miles; Ronald W Jr; EDGEWOOD CHEMICAL BIOLOGICAL CENTER ABERDEEN PROVING GROUND MD RESEARCH AND TECHNOLOGY DIR
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| We measured the vapor-phase absorptivity coefficient of O,S-diethyl methylphosphonothioate in the mid-infrared (4000-550 cm') at a spectral resolution of 0.125 cm(-1). The material used in the feedstock was synthesized at the U.S. Army Edgewood Chemical Biological Center, and the purity was verified by gas chromatography and nuclear magnetic spectroscopy. We describe the experimental method used to acquire the individual spectra that were used to produce the composite spectrum and summarize ... |
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| Vapor-Phase Infrared Absorptivity Coefficient of Isopropyl Methylphosphonofluoridate |
May 2009 |
21 pages |
| Authors:
Barry R Williams; Melissa S Hulet; Alan C Samuels; Miles; Ronald W Jr; EDGEWOOD CHEMICAL BIOLOGICAL CENTER ABERDEEN PROVING GROUND MD
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| We measured the vapor-phase absorptivity coefficient of isopropyl methylphosphonofluoridate in the mid-infrared (4000-550 /cm) at a spectral resolution of 0.125 cm(-1). The chemical used in the feedstock was subjected to a rigorous analysis by gas chromatography-mass spectrometry and nuclear magnetic resonance to verify its purity. We describe the experimental method used to acquire the individual spectra that were used to produce the composite spectrum, summarize the statistical uncertainties in the ... |
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| Vapor Pressure of 2-Chlorovinyl Dichloroarsine (Lewisite) |
Feb-2009 |
22 pages |
| Authors:
Barry R Williams; Melissa S Hulet; EDGEWOOD CHEMICAL BIOLOGICAL CENTER ABERDEEN PROVING GROUND MD
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| Previous vapor pressure data for the vesicant chemical warfare (CW) agent 2-chlorovinyl dichloroarsine (Lewisite) was acquired in the 1920s to 1940s, and reported values in the ambient temperature range have varied widely. The generally accepted values for the compound at 20 and 25C were extrapolated from empirical data that were acquired down to only 50C. We have acquired new data in the range of 2 to 24C. By combining these ... |
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| Vapor-Phase Infrared Absorptivity Coefficient of 2-ChlorovinylDichloroarsine (LEWISITE) |
Jan-2009 |
23 pages |
| Authors:
Barry R Williams; Melissa S Hulet; Alan C Samuels; Miles; Ronald W Jr; Frederic J Berg; Leslie McMahon; H D Durst; EDGEWOOD CHEMICAL BIOLOGICAL CENTER ABERDEEN PROVING GROUND MD
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| We measured the vapor-phase absorptivity coefficient of the vesicant chemical warfare agent 2-chlorovinyl dichloroarsine (Lewisite) in the mid-infrared (4000-550/cm) at a spectral resolution of 0.125/cm. The Lewisite used in the feedstock was purified by fractional distillation and analyzed by nuclear magnetic resonance to verify its purity. We describe the experimental method used to acquire the individual spectra that were used to produce the composite spectrum, summarize the statistical uncertainties in ... |
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| Vapor-Phase Infrared Absorptivity Coefficient of Cyclohexyl Isothiocyanate |
01-Jul-2008 |
21 pages |
| Authors:
Miles; Alan C Samuels; Ronald W Jr; Barry R Williams; Melissa S Hulet; EDGEWOOD CHEMICAL BIOLOGICAL CENTER ABERDEEN PROVING GROUND MD
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| We measured the vapor-phase absorptivity coefficient of cyclohexyl isothiocyanate in the mid-infrared (4000-550 cm(-1)) at a spectral resolution of 0.125 cm(-1). The chemical used in the feedstock was subjected to a rigorous analysis by gas chromatography-mass spectrometry, nuclear magnetic resonance, and Karl-Fischer titration to verify its purity. We describe the experimental method used to acquire the individual spectra that were used to produce the composite spectrum and summarize the statistical ... |
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| Vapor-Phase Infrared Absorptivity Coefficient of BIS-(2-Chloroethyl) Sulfide |
01-Jul-2008 |
31 pages |
| Authors:
Barry R Williams; Melissa S Hulet; Alan C Samuels; Ronald W Miles; Frederic J Berg; Leslie McMahon; H D Durst; SCIENCE APPLICATIONS INTERNATIONAL CORP (SAIC) ABINGDON MD
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| We measured the vapor-phase absorptivity coefficient of the vesicant chemical warfare agent, bis-(2-chloroethyl) sulfide (HD), in the mid-infrared (4000-550/cm) at a spectral resolution of 0.125/cm. The HD used in the feedstock was subjected to a rigorous analysis by gas chromatography (GC) and NMR to verify its purity, and the vapor used to produce the composite spectrum was periodically sampled by GC. In this report, we describe the experimental method employed ... |
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