Chromatograph

Details Chromatograph Chromatograph

1970-12-02

1976-10-12

Queisser, Richard C.

Measuring and testing

Gas analysis

Gas chromatography

73422GC, G01N 3108

Patent

active

039850161

ABSTRACT:
A chromatograph provided with a new and improved purge system for the sample introducing chamber, wherein a first carrier fluid supplying conduit is connected to the chamber adjacent to the sample injection port thereof and a second carrier fluid supplying conduit is connected to the fluid path between the column and the connecting point of the first conduit and the chamber. When a sample is injected into the chamber for analysis, the carrier fluid is supplied into the chamber through the first conduit to carry the sample components into the column, and when the analysis has been completed, the carrier fluid is introduced into the fluid path through the second conduit to flow upstream through the chamber, thereby preventing any of the sample components remaining in the chamber from entering the column to cause "ghost" peaks or baseline fluctuation in the chromatogram.

REFERENCES:
patent: 3285701 (1966-11-01), Robertson
patent: 3327520 (1967-06-01), Stapp
patent: 3566698 (1971-03-01), Sheppard

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