Sample dispensing system for liquid chromatography

Details Sample dispensing system for liquid chromatography Sample dispensing system for liquid chromatography

1987-12-17

1989-03-07

Therkorn, Ernest G.

Liquid purification or separation

Processes

Chromatography

210656, 417392, 417401, 55 67, B01D 1508

Patent

active

048103926

ABSTRACT:
A method and apparatus for supplying a preset amount of sample solution to a liquid chromatographic column wherein (1) a first piston, which moves along the axis of a piston container sealingly contacting the side walls of said piston container, is moved a preset distance so as to draw a fixed amount of driving solution from the driving solution chamber of a piston cylinder into the piston container, thus displacing a second piston which moves along the axis of said piston cylinder sealingly contacting the side walls of said piston cylinder and dividing said piston cylinder into a sample solution chamber and a driving solution chamber, said displacement of said second piston serving to cause sample solution to be drawn from a sample solution reservoir into the sample solution chamber of the piston cylinder in a fixed amount equal to the fixed amount of driving solution drawn into the piston container; and (2) driving solution is pumped into said driving solution chamber in order to displace said second piston so that sample solution in the sample solution chamber is forced out of the sample solution chamber and onto said chromatographic column.

REFERENCES:
patent: 4681678 (1987-07-01), Leaseburge
patent: 4684465 (1987-08-01), Leaseburge

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