Sample dilution system for supercritical fluid chromatography

Details Sample dilution system for supercritical fluid chromatography Sample dilution system for supercritical fluid chromatography

1986-10-10

1987-07-21

Therkorn, Ernest G.

Liquid purification or separation

Flow, fluid pressure or material level, responsive

Proportionate feed means

55386, 2101982, 417 46, 417401, B01D 1508

Patent

active

046816780

ABSTRACT:
An apparatus for analyzing a process stream (1) via supercritical fluid chromatography including container means (10), extraction means (50) for drawing a known sample volume from the process stream and injecting the sample volume into a known volume of supercritical fluid to form a dilute mix (5), analyzer means (70) for analyzing the dilute mix via supercritical fluid chromatography, sample inlet valve means (60) for receiving the dilute mix from the extraction means (50) and supplying a portion of the dilute mix to the analyzer means (70), pneumatically driven piston-type pump means (30) for drawing the substance from the container means (10) and delivering same under pressure either to the extraction means (50) or to the analyzer means (70) as desired, and control means (40) for supplying low pressure air to the pump means (30) in a controlled manner so as to draw the substance from the container means (10) and maintain the substance at a desired pressure above the supercritical pressure for delivery to the analyzer means ( 70) and the extraction means (50) as desired.

REFERENCES:
patent: 3362618 (1968-01-01), Fortinov
patent: 3839863 (1974-10-01), Frazier
patent: 3963383 (1976-06-01), Hill
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patent: 4368008 (1983-01-01), Budzich
patent: 4422942 (1983-12-01), Allington
patent: 4478720 (1984-10-01), Perrut
patent: 4487080 (1984-12-01), Leaseburge
patent: 4580759 (1986-04-01), Leaseburge
patent: 4592842 (1986-06-01), Tomlinson

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