Accession Number : ADA260455


Title :   The Design and Construction of an Ion Trap Based System for Laser Pyrolysis/Mass Spectrometry of Single Organic Aerosol Particles


Descriptive Note : Technical rept. 1 Aug 1991-31 Jul 1992


Corporate Author : UTAH UNIV SALT LAKE CITY CENTER FOR MICRO ANALYSIS AND REACTION CHEMISTRY


Personal Author(s) : Meuzelaar, Henk L ; Cole, Paul A ; Arnold, Neil S ; Hars, George


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a260455.pdf


Report Date : Oct 1992


Pagination or Media Count : 15


Abstract : This report describes the development of particle introduction techniques to support a 3 year program for analysis of single bacteria via laser pyrolysis/mass spectrometry. Results of an investigation into various sample introduction techniques are discussed including the highly successful quasi- electrospray introduction method using a suspension of particles in methanol. Particles from .9 to 13 um have been levitated at pressures down to 10-7 torr, and mass spectrometry pressures of 10-3 torr have been obtained in less than 10 min from particle. The effectiveness of these techniques for particle introduction, pump down and stabilization has exceeded of the authors expectations and gives a positive prognosis for efforts to perform initial laser pyrolysis/mass spectrometry experiments in the year 2 effort.


Descriptors :   *PYROLYSIS , *MASS SPECTROMETRY , *BACTERIAL AEROSOLS , STABILIZATION , BACTERIA , LASER APPLICATIONS , PARTICLES , METHANOLS , PRESSURE , ORGANIC COMPOUNDS , PUMPS , BIOLOGICAL AEROSOLS


Subject Categories : Organic Chemistry
      Physical Chemistry


Distribution Statement : APPROVED FOR PUBLIC RELEASE