Method of analysis by liquid-phase chromatography

Details Method of analysis by liquid-phase chromatography Method of analysis by liquid-phase chromatography

1975-07-15

1977-01-18

Queisser, Richard C.

Measuring and testing

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

Content or effect of a constituent of a liquid mixture

210198C, G01N 3108

Patent

active

040032434

ABSTRACT:
This invention concerns a method of analysis by liquid-phase chromatography with programmed elution gradient.
According to this method, two chromatography columns, of at least approximately similar porous volume and permeability, are each fed with a mixture of two solvents, in such a way that at any point in time the concentration of one of the solvents at the inlet to the first column is the same as the concentration of the other solvent at the inlet to the second column; the substance for analysis is injected into the inlet of one of the two columns; and the fluids leaving both columns are added to each other to form a mixture for analysis in a concentration detector.
The main purpose of the method is to ensure better analysis of petroleum cuts.

REFERENCES:
patent: 3373872 (1968-03-01), Hrdina
patent: 3446057 (1969-05-01), Bakalyar et al.
patent: 3518874 (1970-07-01), Hrdina
patent: 3701609 (1972-10-01), Bailey
patent: 3847550 (1974-11-01), Scott et al.

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