System for and a method of providing a liquid chromatography elu

Details System for and a method of providing a liquid chromatography elu System for and a method of providing a liquid chromatography elu

1977-05-02

1979-05-22

Freeh, William L.

Pumps

Three or more cylinders arranged in parallel, radial, or...

222 14, 222135, F04B 112, B67D 556, B67D 500

Patent

active

041556836

ABSTRACT:
A system for and a method of providing an eluent composed of two different kinds of liquids being mixed at a set concentration and further a time varying concentration or mixing ratio, comprising (a) a step for transferring each of the two liquids by sucking under low-pulsation to on-off valves; (b) a step for periodically controlling the operation of the on-off valves; (c) a step for controlling the amount of each liquid supplied to the mixing region during each period of valve operation; (d) a step for substantially sucking the eluent formed by the above steps in the mixing region for discharging or supplying the same under the same low-pulsation, whereby a mixing of the two liquids under an atmospheric or a low constant pressure, can be effected and a supply of an eluent having a precisely controlled time varying concentration of each liquid can also be effected, and a system for providing such an eluent. Further a system for preparing such an eluent composed of more than two different kinds of liquids can be provided.

REFERENCES:
patent: 29454 (1977-10-01), Ashmead
patent: 2215827 (1940-09-01), Ditto
patent: 3144831 (1964-08-01), Pickels et al.
patent: 3827830 (1974-08-01), Van Horn
patent: 3976400 (1976-08-01), Major
patent: 3985021 (1976-10-01), Achener
patent: 4019652 (1977-04-01), Suh et al.

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