| US 7,531,075 B2 | ||
| Method and apparatus for generating a high purity eluant | ||
| James M. Anderson, Jr., Arlington Heights, Ill. (US); Raaidah Saari-Nordhaus, Lindenhurst, Ill. (US); Carl W. Sims, St. Paul, Minn. (US); and Yuri E. Gerner, Mendota Heights, Minn. (US) | ||
| Assigned to Dionex Corporation, Sunnyvale, Calif. (US) | ||
| Filed on May 18, 2005, as Appl. No. 11/131,864. | ||
| Application 11/131864 is a continuation of application No. 10/427812, filed on May 01, 2003, granted, now 7,364,646. | ||
| Application 10/427812 is a continuation of application No. 09/689176, filed on Oct. 11, 2000, granted, now 6,558,551. | ||
| Application 09/689176 is a continuation of application No. 09/561631, filed on May 02, 2000, granted, now 6,613,235. | ||
| Application 09/561631 is a continuation of application No. 08/609171, filed on Mar. 01, 1996, granted, now 6,093,327. | ||
| Application 08/609171 is a continuation in part of application No. 08/486210, filed on Jun. 07, 1995, abandoned. | ||
| Application 08/486210 is a continuation in part of application No. 08/399706, filed on Mar. 03, 1995, abandoned. | ||
| Prior Publication US 2005/0252774 A1, Nov. 17, 2005 | ||
| This patent is subject to a terminal disclaimer. | ||
| Int. Cl. B01D 61/42 (2006.01); G01N 30/02 (2006.01); G01N 30/26 (2006.01) | ||
| U.S. Cl. 204—551 [210/198.2; 422/70; 436/161; 73/61.52] | 7 Claims |
| 1. A system for detecting sample ions using a high purity eluant comprising:
a water source;
an eluant generator comprising an internal reservoir of eluant ions having the opposite charge as the sample ions and a water
flow path in fluid communication with the water source; and spaced first and second electrodes, said internal reservoir being
disposed between said first and second electrodes;
an analytical column in fluid communication with the water flow path and positioned downstream from the eluant generator in
the path of fluid flow; and
a detector in fluid communication with the water flow path and positioned downstream from the analytical column in the path
of fluid flow.
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