20071113076 - Defense Technical Information Center

1 EDGEWOODCHEMICAL BIOLOGICAL ARMY RESEARCH, DEVELOPMENT AND ENGINEERING COMMANDECBC-TR-575 VAPOR PRESSURE OF GDAlex BalboaJames H. BuchananLeonard C. BuettnerTara SewellDavid E. TevaultRESEARCH AND TECHNOLOGY DIRECTORATEO ctober 2007 Approved for public release;distribution is PROVING GROUND, MD 21010-5424 DisclaimerThe findings in this report are not to be construed as an official Department of the Armyposition unless so designated by other authorizing ApprovedREPORT DOCUMENTATION PAGE OMB No. 0704-0188 Public reporting burden for this collection of inforrnvtion is estirnated to average 1 hour per response, including the time for reviewnq instructions, searching existing data sources, gathering and maintaining thedata needed, and completing and reviewing this collection of innation.

2 Send comments regarding this burden estsate or any other aspect of this collection of iformation. kcuding suggestions for reducingthis burden to Department of Defense , Washington Headquarters Services, Directorate for Information Operations and Reports (0704-0188), 1215 Jefferson Davis Highway, Sulte 1204, Adit. VA 22202-4302. Respondents should be aware that nohstanding any other provision of law, no person shall be subject to any penalty for failing to comply with a collection of Information 1t does not display a currentlyvalid OW control nunber. PLEASE DO NOT RETURN YOUR FORM TO THE ABOVE REPORT DATE (DD-MM-YYY) 2.

3 REPORT TYPE 3. DATES COVERED (From -To)XX-10-2007 Final Apr 2006- Sep 20064. TITLE AND SUBTITLE 5a. CONTRACT NUMBERV apor Pressure of GD 5b. GRANT NUMBER5c. PROGRAM ELEMENT NUMBER6. AUTHOR(S) 5d. PROJECT NUMBERB alboa, Alex; Buchanan, James H.; Buettner, Leonard C.; Sewell, Tara; and 6 RHAX1 Tevault, David E. Se. TASK NUMBER5f. WORK UNIT NUMBER7. PERFORMING ORGANIZATION NAME(S) AND ADDRESS(ES) 8. PERFORMING ORGANIZATION REPORTNUMBERDIR, ECBC, ATTN: AMSRD-ECB-RT-PF, APG, MD 21010-5424 ECBC-TR-5759. SPONSORING I MONITORING AGENCY NAME(S) AND ADDRESS(ES) 10. SPONSOR/MONITOR'S ACRONYM(S)11. SPONSOR/MONITOR'S REPORTNUMBER(S)12.

4 DISTRIBUTION I AVAILABILITY STATEMENTA pproved for public release; distribution is SUPPLEMENTARY NOTES14. ABSTRACTThe vapor pressure of pinacolyl methyl phosphonofluoridate [O-(1,2,2-trimethylpropyl)-methyl phosphonofluoridate,GD] has been measured between -20 and 50 OC, using vapor saturation methodology. The current data are ingood agreement with data previously SUBJECT TERMSP inacolyl methyl phosphonofluoridate Vapor pressure Agent GDVapor saturation methodology Soman16. SECURITY CLASSIFICATION OF: 17. LIMITATION 18. NUMBER 19a. NAME OF RESPONSIBLE PERSONOF ABSTRACT OF PAGES Sandra J. Johnsona. REPORT b.

5 ABSTRACT c. THIS PAGE 19b. TELEPHONE NUMBER (include areaU U U UL 18 code)(410) 436-2914 Standard Form 298 (Rev. 8-98)Prescribed by ANSI Std. work described in this report was authorized under Project No. 6 RHAX1. Thework was started in April 2006 and completed in September use of either trade or manufacturers' names in this report does not constitutean official endorsement of any commercial products. This report may not be cited for purposesof report has been approved for public release. Registered users shouldrequest additional copies from the Defense Technical Information Center ; unregistered usersshould direct such requests to the National Technical Information authors wish to thank Kenneth B.

6 Sumpter for analysis of the GD samplesand Ann B. Butrow for her helpful INTRO DUCTIO N .. 72. EXPERIM ENTAL PRO CEDURES .. 73. RESULTS AND DISCUSSIO N .. 94. CO NCLUSIO NS .. 9 LITERATURE CITED .. 17 FIGUREV apor Pressure Data for Nerve Agent GD and Antoine Fit .. 10 TABLES1. Vapor Pressure Measured in this Work for GD by Vapor Saturationusing the Purge-and-Trap Method, -20 to +10 C, and a CalibratedSample Loop, +15 to +50 C, Calculated Values using AntoineEquation from Savage and Fielder,2 and Percent Difference .. 112. Literature Vapor Pressure Data Measured for GD using KnudsenEffusion by Savage and Fielder, Calculated Values using Savage's andFielder's Antoine Fit Coefficients, and Percent Difference.

7 123. Literature Vapor Pressure Data Measured for GD using Isoteniscopeby Savage and Fielder, Calculated Values using Savage's and Fielder'sAntoine Fit Coefficients and Percent Difference .. 134. Vapor Pressure Data Measured for GD using DTA by Belkin andBrown, Values Calculated using Savage's and Fielder'sAntoine Fit Coefficients, and Percent Difference betweenCalculated and Experimental Values .. 145. Vapor Pressure Data Measured for GD using Vapor Saturationby Podoll and Parish, Values Calculated using Savage's andFielder's Antoine Fit Coefficients, and Percent Differencebetween Calculated and Experimental Values.

8 146. Vapor Pressure, Heat of Vaporization and Volatility of GD between-30 and 200 C Calculated using Savage's and Fielder's AntoineC oeffi cients ..15 VAPOR PRESSURE OF GD1. INTRODUCTIONThe vapor pressure of GD has been measured previously using differentialthermal analysis (DTA) between and 'C (Laboratory Notebook No. 8343, p 92),1isoteniscope between 40 and oC,2 Knudsen effusion between and oC,2 andvapor saturation between -35 and 0 An Antoine equation correlation, based on these data,has been pressure data for several CW agents and simulants have been measuredin the ambient temperature range in our laboratory using a modified ASTM vapor We have also begun to assess the effect of ambient humidity on the volatility ofsimulants1'13 and The current GD vapor pressure measurements have beenperformed using methodology most similar to that used recently for cyclohexylmethylphosphonofluoridate (GF)

9 7 and span the temperature range of 15 to 50 OC. Data havealso been measured between -20 and 10 OC using the purge-and-trap method described indetail in an earlier purpose of the present experiments was to lay the foundation for measuringthe effect of humidity on GD volatility as a means to better understand its environmentalbehavior, as well as to confirm the validity of historical data, particularly in the ambienttemperature range of EXPERIMENTAL PROCEDURESThe quantitative data reported herein were measured using a Hewlett PackardModel 5890 Series II gas chromatograph (GC) equipped with a flame ionization detector (FID).

10 Nitrogen was used as the GC carrier at a flow rate of 8 (actual) cubic centimeters per minute(ccm) and was also used as the detector make-up gas at a flow rate of 22 ccm. Thecombustion gases were air (400 ccm) and hydrogen (30 ccm). The GC column used for thesaturator purge-and-trap experiments was 30 m long, inside diameter fused silica pm Rtxo-l film thickness (Crossbond 100% polydimethylsiloxane, Restek Corporation,Bellefonte, PA). The GC column for the saturator gas loop experiments was 15 m long, inside diameter fused silica with pm HP-1701 film thickness (14% cyanopropylphenyl -86% methylpolysiloxane, Agilent Technologies, Wilmington, DE).