On-line suppressor
AssigneeBoard of Regents, The University of Texas System
InventorsPurnendu K. Dasgupta, Bikash Chouhan, Joseph Ray
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Abstract
A device for ion chromatography comprises a tube with an inlet opening and an outlet opening and an inner diameter from about 40 microns to about 10 microns. There is an aperture through one side of the tube into a lumen of the tube. At least a portion of the inner surface of the tube has a first charge. An ion exchange barrier covers the aperture on an outside surface of the tube. The inner surface of the tube, from the inlet opening to the aperture, is coated with ion exchange particles having a diameter ranging from about 30 nm to about 200 nm. The ion exchange particles have a second charge opposite the first charge. The inner surface of the tube, from the outlet opening to the aperture, is not coated with ion exchange particles.
Claims12
A device for ion chromatography comprising:
- a tube with an inlet opening and an outlet opening and an inner diameter from about 40 microns to about 10 microns, wherein there is an aperture through one side of the tube into a lumen of the tube, wherein at least a portion of the lumen surface of the tube has a first charge,
- wherein there is an ion exchange barrier covering the aperture on the outside surface of the tube,
- wherein the inner surface of the tube, from the inlet opening to the aperture, is coated with ion exchange particles having a diameter ranging from about 30 nm to about 200 nm, wherein the ion exchange particles have a second charge opposite the first charge,
- wherein the inner surface of the tube, from the outlet opening to the aperture, is not coated with ion exchange particles.
A method of analysis of sample ions in a liquid sample comprising:
- a) providing a tube comprising an inlet opening and an outlet opening and an inner diameter, wherein there is an aperture through one side of the tube into a lumen of the tube, wherein at least a portion of the inner surface of the tube has a first charge
- wherein there is an ion exchange barrier covering the aperture on the outside of the tube,
- wherein the inner surface of the tube, from the inlet opening to the aperture, is coated with ion exchange particles, wherein the ion exchange particles have a second charge opposite the first charge,
- wherein the inner surface of the tube, from the outlet opening to the aperture, is not coated with ion exchange particles
- b) using an eluent comprising ions to flow a liquid sample comprising sample ions to be detected through the tube,
- c) exchanging eluent counterions of the eluent using the ion exchange barrier to remove eluent counterions from the lumen,
- d) detecting the ions of the liquid sample with a detector.
Dependencies are inferred from the claim text.