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Titolo:
CAPILLARY ION CHROMATOGRAPHY WITH ONLINE HIGH-PRESSURE ELECTRODIALYTIC NAOH ELUENT PRODUCTION AND GRADIENT GENERATION
Autore:
SJOGREN A; BORING CB; DASGUPTA PK; ALEXANDER JN;
Indirizzi:
TEXAS TECH UNIV,DEPT CHEM & BIOCHEM LUBBOCK TX 79409 TEXAS TECH UNIV,DEPT CHEM & BIOCHEM LUBBOCK TX 79409 ROHM & HAAS CO SPRING HOUSE PA 19477
Titolo Testata:
Analytical chemistry
fascicolo: 7, volume: 69, anno: 1997,
pagine: 1385 - 1391
SICI:
0003-2700(1997)69:7<1385:CICWOH>2.0.ZU;2-N
Fonte:
ISI
Lingua:
ENG
Soggetto:
2-DIMENSIONAL CONDUCTOMETRIC DETECTION; CALIBRATION;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
17
Recensione:
Indirizzi per estratti:
Citazione:
A. Sjogren et al., "CAPILLARY ION CHROMATOGRAPHY WITH ONLINE HIGH-PRESSURE ELECTRODIALYTIC NAOH ELUENT PRODUCTION AND GRADIENT GENERATION", Analytical chemistry, 69(7), 1997, pp. 1385-1391

Abstract

A small inexpensive system is described that allows high-performance suppressed anion chromatography on a capillary scale, A fully computer-controlled stepper motor-driven syringe-type dispenser, equipped witha 500 mu L-capacity glass syringe is capable of pumping at pressures up to 1000 psi when equipped with an appropriate inlet check valve. Fused-silica capillary columns similar to 50 cm in length and 180 mu m i.d., packed in-house with a commercial packing, provide excellent performance, significantly exceeding the efficiencies observed for the same packing in commercially available 2 mm bore format, The system operates with a pressure drop of <800 psi at a now rate of 2 mu L/min. The system utilizes a novel electrodialytic NaOH eluent generator that is deployed on the high-pressure side of the pump and thus requires no special measures for electrolytic gas removal, This device permits both isocratic and gradient operation with excellent eluent purity; the NaOH concentration is generated linearly with applied current with near-Faradaic efficiency, up to a concentration of at least 100 mM.

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Documento generato il 28/11/20 alle ore 18:36:44