Liquid purification or separation – Processes – Chromatography
Patent
1987-12-09
1989-10-10
Therkorn, Ernest G.
Liquid purification or separation
Processes
Chromatography
2101982, 422 70, 422 81, 436 52, 436150, 436161, B01D 1508
Patent
active
048729922
ABSTRACT:
Ion chromatograms are prepared with a chromatograph including a separation column and a conductivity measuring ion detection unit which are adapted to be selectively placed in communication with separate reservoirs for diluted and undiluted samples of a fluid to be analyzed. A control unit switches the reservoirs into communication with an eluent pump for displacing fluid samples through the detection unit in timed relationship such that the most concentrated ion is measured in the diluted sample prior to measurement by the detection unit of the last of the lesser concentrated ions. A pump having a controllable flow rate is connected to a mixing conduit through control valves which switch the flow to and from the reservoirs so that the reservoirs may be simultaneously filled with diluted and undiluted samples of fluid. The diluted sample may be prepared by mixing the undiluted fluid with the eluent.
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Leone Joseph A.
Oquendo Javier N.
Atlantic Richfield Company
Martin Michael E.
Therkorn Ernest G.
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