Accession Number : AD0777868

Title :   Comparative Evaluation of Trace Gas Technology. Volume II. Analysis and Evaluation of Instrumental Methods.

Descriptive Note : Final rept. Jan-Dec 73,

Corporate Author : RESEARCH TRIANGLE INST DURHAM N C

Personal Author(s) : Harrison,J. W.

Report Date : DEC 1973

Pagination or Media Count : 528

Abstract : The collected reports represent a survey undertaken to determine which instrumental methods are potential candidates for detection of trace quantities of TNT or DNT emitted from military land mines. The first group consists of analyses of the theory of operation of existing instrumental methods which have, or could be expected to achieve in the near future, the sensitivity required to detect trace gas quantities of TNT or DNT. From this analysis the operating parameters influencing sensitivity, selectivity and response time are identified. Recommendations for design changes and future development are given. The next group are analyses on signal processing considerations and on membrane separators, which are used in several existing instruments. The third group discuss evaluations of existing instruments in order to determine their sensitivity and utility. The factors which can influence the transport of vapors emitted from mines through the soil cover to the soil-air interface where they are to be detected are discussed.

Descriptors :   *Gas detectors, *DNT, *TNT, *Gas analysis, Mine detection, Vapors, Sensitivity, Signal processing, Performance(Engineering), Membranes, Electron capture, Mass spectroscopy, Chemiluminescence, Molecular spectroscopy, Cyclotron resonance, Mass transfer, Soils

Subject Categories : Organic Chemistry
      Ammunition and Explosives
      Atomic and Molecular Physics and Spectroscopy

Distribution Statement : APPROVED FOR PUBLIC RELEASE