Method for chromatographic analysis and apparatus therefor

Details Method for chromatographic analysis and apparatus therefor Method for chromatographic analysis and apparatus therefor

G - Physics

01

N

73/93

G01N 30/96 (2006.01) G01N 30/60 (2006.01)

Patent

CA 1220053

TO-4-36518C/KT/84. ABSTRACT OF THE DISCLOSURE In chromatographic analysis by the steps of adding a sample solution to a flow of an eluant, passing the eluant flow through a separation column thereby converting the eluant flow into an eluate flow containing component ions of the eluant flow in separate zones, passing the eluate flow through an ion-exchange membrane tube thereby allowing the eluate to come into contact with an aqueous solution of an H+ form or OH- form electrolyte outside the tube through the medium of the membrane wall of the tube, substituting those of the component ions contained in the eluate flow which have the same type of electric charge as H+ or OH- with said H+ or OH- thereby giving rise to a deionized solution flow, and passing the deionized solution flow through a detection cell thereby causing the component ions which have survived the substitution to be detected as separated into distinct zones, improvements are obtained by causing the aqueous solution of H+ or OH- form electrolyte has been exposed to an insoluble ion exchanger equal in liquidity to the aqueous solution. Use of the high molecular electrolyte having a molecular weight of 500 or more permits detecting anion or cation present in a very low concentration with ample sensitivity and high reproducibility without provision of fowarding means.

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