发明名称 |
METHOD AND APPARATUS FOR ION ANALYSIS AND DETECTION USING REVERSE MODE SUPPRESSION |
摘要 |
A method of ion analysis and detection of weakly dissociated anions or cations in an eluent by first separating such ions on a chromatographic separation medium by ion exclusion chromatography or mobile phase ion exclusion chromatography. The eluent includes an acid or base with a co-ion of the same charge as the ions to be separated, such co-ions being in the hydronium or hydroxide form. In one embodiment the effluent from the separation medium is contacted with one side of an ion-exchange membrane (20) having exchangeable ions of opposite charge to the ionic species. The opposite side of the membrane includes a regenerant with salt-forming suppression ions capable of forming a weakly conducting salt with the co-ions. Then the separated ionic species are detected preferably by a conductivity detector (12). In another embodiment, the membrane is replaced by a resin bed with ion-exchangig sites of opposite charge to the co-ions. There, co-ions form a suppressed salt with the exchangeable ions. |
申请公布号 |
DE3466806(D1) |
申请公布日期 |
1987.11.19 |
申请号 |
DE19843466806 |
申请日期 |
1984.07.27 |
申请人 |
DIONEX CORPORATION |
发明人 |
POHL, CHRISTOPHER A.;JOHNSON, EDWARD L.;SLINGSBY, ROSANNE W.;ANGERS, LEILANI |
分类号 |
G01N30/88;B01D15/08;G01N30/02;G01N30/60;G01N30/96;(IPC1-7):G01N30/46 |
主分类号 |
G01N30/88 |
代理机构 |
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代理人 |
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主权项 |
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