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helium flow of 10 ml/min was passed through the cell, and the pyrolysis products were condensed on
the front of the capillary column, which was held at -55°C. A DB-5 column was employed, 30 m long,
320 µm I.D., carrying a film of stationary phase 0.25 µm thick.

After pyrolysis was complete, the column was programmed from -55°C to 200°C at 5°/min. The mass
spectrometer scanned the eluent at 1.3 scans/sec over the mass range 25-450 amu. It was found that
particles 0.5-1.0 µm in diameter and weighing as little as 40 µg could be identified using this technique.
The triplet combination was able to identify rat food and soilless plant-growth media, as two sources of
particles collected from the shuttle atmosphere taken during flight.
Table 5.1 Mass Spectrometer Suppliers
Mass Spectrometer Supplier
Automass 150 ATI Instruments, 1001 Fourier Drive,
Madison, WI 53717, 608-831-5515.

Magnum Finnigan MAT, 355 River Oaks Pkwy,
San Jose, CA 95134, 408-433-4800.
MD 800 EI/CI+/CL - Fissons Instruments, 55 Cherry Hill Dr.,
Beverly, MA 01915, 508-524-1000.

5972A Hewlett Packard, 2850 Centreville Road,
Wilmington, DE 19808, 302-633-8000.

3DQC Hitachi Instruments, 3100 North First St.,
San Jose, CA 95134, 408-432-9520
Q-Mass 910 Perkin Elmer, 761 Main Avenue, Norwalk,
CT 06859, 203-762-1000.
QP-5000 Shimadzu, 7102 Riverwood Drive,

Columbia, MD 21046, 410-381-1227.
3DQ DiscoveryC Teledyne, 1274 Terra Bella Avenue,
Mountain View, CA 94043, 415--691-9800

Saturn 3 Varian, 2700 Mitchell Drive, Walnut Creek,
CA 94598, 510-939-2400.

GC/MS is an extremely powerful analytical procedure and has a wide range of applications. In general
it cannot unambiguously elucidate the