US 11,988,649 B2
On-line suppressor
Purnendu K. Dasgupta, Arlington, TX (US); Bikash Chouhan, Arlington, TX (US); and Joseph Ray, Midlothian, TX (US)
Assigned to Board of Regents, The University of Texas System, Austin, TX (US)
Filed by BOARD OF REGENTS, THE UNIVERSITY OF TEXAS SYSTEM, Austin, TX (US)
Filed on Oct. 6, 2020, as Appl. No. 17/063,873.
Prior Publication US 2022/0107292 A1, Apr. 7, 2022
Int. Cl. G01N 30/38 (2006.01); B01D 15/36 (2006.01); G01N 30/84 (2006.01)
CPC G01N 30/38 (2013.01) [B01D 15/361 (2013.01); G01N 2030/8458 (2013.01)] 12 Claims
OG exemplary drawing
 
1. 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.