Process and apparatus for chemical analyses by liquid chromatogr

Details Process and apparatus for chemical analyses by liquid chromatogr Process and apparatus for chemical analyses by liquid chromatogr

1985-08-02

1989-05-30

Richman, Barry S.

Chemistry: analytical and immunological testing

Including sample preparation

Liberation or purification of sample or separation of...

436161, 422 70, 422 81, 422 82, 422103, 73 611C, 7386383, 7386386, 7386435, 7386421, 7386483, G01N 114, B01D 1508

Patent

active

048351091

ABSTRACT:
A process and an apparatus for performing analyses in liquid chromatography, by ways of a pump capable of drawing a fluid and injecting it at high pressure, through at least a control valve, into a separation column.
To obtain maximum precision as required by the analysis, before each analysis or each group of analyses, or with respect to each fluid used, a pump stroke is performed with the pump delivery side shut off in order to record and store the characteristics of compressibility of the fluid. These characteristics are kept into consideration in the subsequent operative stages to obtain an exactly constant delivery of the feed pump to the separation column.

REFERENCES:
patent: 3266321 (1966-08-01), Fenske et al.
patent: 3901653 (1975-08-01), Jones et al.
patent: 4486097 (1984-12-01), Riley

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