Gradient nanopump based suppressed ion chromatography using PEEK open tubular columns
Weixiong Huang, Alex Plistil, Stanley D. Stearns, Purnendu Κ. Dasgupta
Abstract
The progress of open tubular suppressed ion chromatography is reviewed from a broad perspective. Then a suppressed open tubular ion chromatography system, composed mostly of commercial components, is described: A splitless gradient-capable nanopump providing eluent delivery in the 10–1000 nL/min regime, a 7-nL injector integral to the pump, an anion exchange column based on a 25 µm i.d. poly(ether ether ketone) (PEEK) capillary, and an on-column admittance detector. The membrane suppressor was custom fabricated. Good gradient separation of seven common anions in 9 min is demonstrated using a manually prepared hydroxide eluent.
Topics & Concepts
PeekColumn chromatographyChromatographyIon chromatographyIon exchangeInjectorChemistryHydroxideAnalytical Chemistry (journal)Materials scienceIonOrganic chemistryPhysicsPolymerThermodynamicsAnalytical Chemistry and ChromatographyMicrofluidic and Capillary Electrophoresis ApplicationsNanopore and Nanochannel Transport Studies