Accession Number : AD0746281

Title :   Trace Gas Analysis by Mobility Separation.

Descriptive Note : Technical note,

Corporate Author : TORONTO UNIV (ONTARIO) INST FOR AEROSPACE STUDIES

Personal Author(s) : Laszlo,George Peter

Report Date : DEC 1971

Pagination or Media Count : 26

Abstract : Alpha and beta particles or ion pairs are formed by placing a radioactive source in a sample air stream. The charges then first complex with water vapour and finally end up on any highly polarizable or electronegative impurity species present. Pulses of ions so formed can be drifted down a tube by a one-dimensional field and a time-of-arrival spectrum is generated. This is known as a plasma chromatogram by analogy to an ordinary gas chromatogram. The project was designed to be a feasibility study of a continuous flow analogue to this device because of the desire to use large sample gas rates and extremely high scavenging efficiency for impurity atoms. In the paper, the Langevin equation is used to calculate the ionic masses corresponding to the calculated mobilities. The experimental method presented and the empirical formula of Carroll and Kilpatrick can be used for trace gas analysis by mobility separation.

Descriptors :   (*GAS DETECTORS, *MASS SPECTROSCOPY), AIR, MICROANALYSIS, IONS, GAS FLOW, GAS IONIZATION, RADIOACTIVE ISOTOPES, DRIFT, MOBILITY, CANADA

Subject Categories : Test Facilities, Equipment and Methods
      Atomic and Molecular Physics and Spectroscopy

Distribution Statement : APPROVED FOR PUBLIC RELEASE