Liquid chromatography system

Details Liquid chromatography system Liquid chromatography system

1976-09-10

1977-11-22

Ruehl, Charles A.

Measuring and testing

Liquid analysis or analysis of the suspension of solids in a...

Content or effect of a constituent of a liquid mixture

73422GC, G01N 3108

Patent

active

040590097

ABSTRACT:
Improved method and apparatus for injecting a predetermined amount of a sample liquid into a high pressure stream of carrier liquid for introduction into a liquid chromatography column, wherein the flow of high pressure carrier liquid in the column is maintained at a substantially constant pressure and rate of flow, including periodically accumulating a precise amount of sample liquid in a primary flow path of carrier liquid to the column while automatically diverting all of the carrier liquid into a secondary flow path to the column in response to a small increase in carrier liquid pressure upstream of the sample accumulation point. Also disclosed is a three position, rotary sample injection valve having improved sealing means for introducing a sample liquid into a high pressure carrier liquid.

REFERENCES:
patent: 3411525 (1968-11-01), Auger
patent: 3864978 (1975-02-01), Stephens
patent: 3916692 (1975-11-01), Abrahams et al.
patent: 3961534 (1976-06-01), Gundelfinger

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