Gradient nanopump based suppressed ion chromatography using PEEK open tubular columns
Weixiong Huang,
Alex Plistil,
Stanley D. Stearns,
Purnendu K. Dasgupta
Affiliations
Weixiong Huang
Department of Chemistry and Biochemistry, The University of Texas at Arlington, Arlington, TX 76019-0065, United States; Present Address: School of Environmental Studies, China University of Geosciences, Wuhan 430078, Hubei, China
Alex Plistil
VICI Valco Instruments, POB 55603, Houston, TX 77255, United States
Stanley D. Stearns
VICI Valco Instruments, POB 55603, Houston, TX 77255, United States
Purnendu K. Dasgupta
Department of Chemistry and Biochemistry, The University of Texas at Arlington, Arlington, TX 76019-0065, United States; Corresponding author.
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.
