Electrochemically generated multifunctional suppressor for ion chromatography

Abstract

A multifunctional suppressor for both anion and cation chromatography has been designed. The suppressor comprises five thin chambers - an anion eluent suppressive chamber, a cation eluent suppressive chamber, a cathode chamber, an anode chamber, and a common electrode chamber, all of which are clipped together An electrochemical process - electrolysis of deionized water or detector effluent - is used to regenerate the suppressor for continuous operation. Two power sources are used to supply current. The device can work as an anion suppressor, a cation suppressor, or as both anion and cation suppressors, with high suppression capacity (60 mmol L-1) and good reproducibility (RSD = 0.80-0.91%) and linearity (r = 0.9992)

A cation exchange resin bead-based microscale electrolytic suppressor for capillary ion chromatography

“…The suppressor is one of the key components in IC and can reduce the background conductance of the eluent and simultaneously enhance the analyte signal. Various types of suppressors have been developed in the past decades to achieve higher sensitivity, including packed column [1], hollow fiber [2] or monofilament filled fiber [3], micro membrane-based suppressor operated in chemical [4] or electrolytic mode [5,6]. Most of the above devices were designed for conventional IC systems, and less work has been done on capillary IC (CIC), despite the facts that CIC has several advantages over conventional IC such as higher separation efficiency, lower eluent consumption, and easier coupling with MS.…”