Liquid purification or separation – Processes – Chromatography
Patent
1985-12-19
1988-03-22
Therkorn, Ernest G.
Liquid purification or separation
Processes
Chromatography
2101982, 422 70, 436150, 436161, B01D 1508
Patent
active
047326867
ABSTRACT:
Apparatus and method for the chromatographic separation and analysis of ionic species. This process is carried out utilizing, in an ion separator column, the combination of a low capacity, high performance resin as the stationary phase, and a weakly ionized electrolyte as the eluant or developing reagent, to effect resolution of ionic species in solution. For anion separation, a weak base resin of low capacity and high efficiency is used as the stationary phase, and a solution of a weak base or water as the mobile phase. For cation separation, a weak acid resin of low capacity and high efficiency is used as the stationary phase and a solution of a weak acid as the mobile phase. Because the eluant employed has a very low background conductivity, it will register only insignificantly on the readout from the conductivity cell. Thus, the method of the invention obviates the need for the eluant suppressor or "stripper" device used in conventional ion chromatography. The invention thereby enables continuous, uninterrupted measurements and eliminates the reservoirs, pumps, complex valving and electronics associated with such suppressor columns.
REFERENCES:
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patent: 4303531 (1981-12-01), Kawabata
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patent: 4556463 (1985-12-01), Minz
Pischke James W.
Small Hamish
Soderquist Mark E.
The Dow Chemical Company
Therkorn Ernest G.
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