Sorbent tube, thermal injection apparatus

Details Sorbent tube, thermal injection apparatus Sorbent tube, thermal injection apparatus

G - Physics

01

N

73/104

G01N 35/00 (2006.01) G01N 1/00 (2006.01) G01N 30/08 (2006.01) G01N 30/20 (2006.01) G01N 30/12 (2006.01)

Patent

CA 1274704

T I T L E A SORBENT TUBE, THE INJECTION APPARATUS INVENTORS Lorne Elias André H. Lawrence ABSTRACT OF THE DISCLOSURE A sorbent tube, thermal injection apparatus compri- ses a tubular casing for connection at a downstream end to, say, a gas chromatograph, a spring loaded valve in the bore of the casing, a valved, purging gas inlet downstream of the spring loaded valve and a sorbent tube receiving end portion upstream thereof, surrounded by a heating coil, and fitted with an O-ring seal. The tubular casing is connected to a sample entry of a gas chromatograph and purging gas is fed to the gas chromatograph. A sample carrying end of a sorbent tube is inserted in the tubular casing to depress and open the spring loaded valve while a carrier gas is fed along the sorbent tube and the heating coil heats the sample carrying end to release the sample. The purging gas is shut off to allow the carrier gas to convey the sample into the gas chromatograph.

520694

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