Patent ID: 7524457
Filing Date: 2009-04-28
Classification: G01N

Abstract:
1. Apparatus for analysis of ionic species in an aqueous liquid stream comprising: (a) a chromatographic separator including medium for separating said ionic species and having an inlet and an outlet, (b) a source of an aqueous eluent solution comprising electrolyte in fluid communication with said chromatographic separator, (c) a membrane suppressor comprising a chromatography effluent flow channel separated by an ion exchange membrane from a regenerant flow channel, (d) a separate liquid reservoir container independent of said suppressor and including an inlet and an outlet, said container outlet being in fluid communication with said regenerant flow channel, said container having a volume of at least about 5 ml, (e) a detector for detecting ionic species in fluid communication with said chromatography effluent flow channel, (f) a recycle conduit for the flow of effluent from said detector to said container inlet, and (g) a second conduit between said container and suppressor and an indicator disposed in said second conduit for indicating a characteristic of the liquid flowing therebetween.