Patent ID: 8101422
Filing Date: 2012-01-24
Classification: G01N

Abstract:
1. Ion chromatography apparatus comprising (a) a first housing defining a first flowthrough chamber containing first separation medium for separating ionic species of one charge, positive or negative, in a liquid sample stream, (b) a second housing defining a second flowthrough chamber containing second separation medium of the same charge as said first separation medium for separating ionic species in a liquid sample stream, said second chamber having a volume no greater than 0.9 times the volume of the said first chamber; (c) first valving disposed between said first chamber and said second chamber configured to permit selective transfer of ionic species from first chamber to second chamber for further analysis; (d) a flowthrough ionic species concentrator disposed in said first valving and in fluid communication therewith; said first valving having a first position in which said first chamber is in fluidic communication with said concentrator and a second position in which liquid flow from said first chamber bypasses said concentrator, said first valving permitting continuous flow through said first chamber in both said first position and said second position.