Methods and means for detection of dangerous substances

Details Methods and means for detection of dangerous substances Methods and means for detection of dangerous substances

1990-07-02

1992-08-25

Williams, Hezron E.

Radiant energy

Ionic separation or analysis

With sample supply means

73 2335, 73 234, G01N 3300

Patent

active

051421445

ABSTRACT:
The presence of dangerous substances such as cocaine is detected by atmospheric samples that include the residues (such as ether) of the manufacture of the suspected substances into a gas chromatograph to remove substances other than the residues and thereafter drawing them into a proportional counter chamber having a high voltage and a signal wire. A laser passes light capable of exciting the suspected residues through the proportional counter to produce ionization and generate a photoelectron. The signal wire passes this to an analyzer which indicates the presence of the suspected residues.

REFERENCES:
patent: 3134898 (1964-05-01), Burnall et al.
patent: 3169389 (1965-02-01), Green et al.
patent: 3169832 (1965-02-01), Galloway et al.
patent: 4398152 (1983-08-01), Leveson
patent: 4413185 (1983-11-01), Leveson

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