Device for preparing a gradient solution for a high-pressure liq

Details Device for preparing a gradient solution for a high-pressure liq Device for preparing a gradient solution for a high-pressure liq

1989-08-07

1990-09-04

Therkorn, Ernest G.

Liquid purification or separation

With means to add treating material

Chromatography

210101, 366160, 366177, B01D 1508

Patent

active

049542532

ABSTRACT:
A device for preparing a gradient solution for a high-pressure liquid chromatograph comprises vessels (1) containing eluents, a switch-over unit (7), a piston pump (9) and a mixer (4). Each vessel (1) containing eluents has a movable partition (10) dividing it into two chambers (11,12). The switch-over unit (7) is fashioned as a flow-through chamber (13) accommodating a rotary switch-over valve having a rotor (15) and stator (16). The rotor (15) has one through passage (17), whereas the stator (16) is provided with through passages (18) equal in number to the number of vessels (1) each communicating with the corresponding vessel (1) and arranged so that during rotation of the rotor (15) the through passage (17) provided therein is capable of connecting alternately to the passages (18) of the stator (16).

REFERENCES:
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patent: 4389316 (1983-06-01), Falk
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patent: 4591442 (1986-05-01), Andrews
patent: 4595496 (1986-06-01), Carson
patent: 4714545 (1987-12-01), Bente
patent: 4728434 (1988-03-01), Trafford

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