Vapor Pressure Measurements of Some Chemical Agents Using Differential Thermal Analysis. Part 1

Abstract

A method for determining vapor pressure-temperature relations for chemical agents has been developed using a modified differential thermal analysis (DTA) apparatus. Vapor pressure data for 10 compounds have been generated. These compounds are: GF, VX, EA 1356, EA 2222, EA 2223, EA 4923, EA 5365, EA 5403, EA 5414, and EA 5488. A computer program was used to reduce the experimental data and fit it to the Antoine vapor pressure equation. In addition, volatility and heat of vaporization were calculated for each compound over selected temperature ranges. The method permits vapor pressure measurements at higher temperatures and pressures than afforded by conventional methods, such as the Knudsen cell and the isoteniscope. The dynamic nature of the technique reduces problems of agent decomposition, and the method provides reliable data. Only small amounts of sample are needed to determine a vapor pressure curve.

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Document Details

Document Type
Technical Report
Publication Date
Mar 01, 1973
Accession Number
AD0525359

Entities

People

  • Frederic Belkin
  • Harry A. Brown Jr.

Tags

DTIC Thesaurus Topics

  • Accuracy
  • Boiling Point
  • Chemical Warfare Agents
  • Chemistry
  • Computer Programs
  • Differential Thermal Analysis
  • Equations
  • Experimental Data
  • Heat Energy
  • Heat Of Vaporization
  • Materials
  • Measurement
  • New York
  • Phase Transformations
  • Pressure Measurement
  • Thermal Analysis
  • Vapor Pressure

Readers

  • Analytical Chemistry
  • Combustion science or combustion engineering.
  • Environmental Impact Assessment (EIA) of Proposed Air Force Base Actions.