Sample modulator cell for gas chromatography

Details Sample modulator cell for gas chromatography Sample modulator cell for gas chromatography

1985-09-18

1986-10-14

Spitzer, Robert

Gas separation

Means within gas stream for conducting concentrate to collector

55197, 73 231, 436161, 436181, B01D 1508, G01N 3108

Patent

active

046170324

ABSTRACT:
A sample modulator cell for chromatographic analysis uses a diverting valve to send a carrier gas into a duct in a generally closed circular form periodically alternately through two separate ports. A sample inlet port opens between the carrier ports so that a sample-containing gas periodically alternately flows to an exit port through two channels A and B of different lengths in the duct. A phase-shift of 180.degree. is introduced between the channels so that all of the sample introduced into the modulator will be used for the analysis, thus increasing the peak response.

REFERENCES:
patent: 2451882 (1948-10-01), Smith
patent: 3357232 (1967-12-01), Lauer
patent: 3357233 (1967-12-01), Roof
patent: 3740154 (1973-06-01), Green
patent: 3811253 (1974-05-01), Austin et al.
patent: 4309898 (1982-01-01), Horton
patent: 4316381 (1982-02-01), Woodruff
patent: 4316382 (1982-02-01), Woodruff
patent: 4442217 (1984-04-01), Deans

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