Suppressed conductometric capillary electrophoresis separation systems

Journal Article · Thu Apr 15 00:00:00 EDT 1993 · Analytical Chemistry (Washington); (United States)

DOI:https://doi.org/10.1021/ac00056a010· OSTI ID:5848117

Dasgupta, P K; Bao, L ^[1]

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1. Texas Tech Univ., Lubbock (United States)

A tubular cation-exchange membrane is installed at the end of a 60-cm-long 75-[mu]m-bore fused-silica capillary. A static dilute acid regenerant solution surrounds the membranes that functions as a suppressor. With positive high voltage applied to the capillary inlet and the regenerant solution grounded, effective suppression of electrolytes such as solutions of alkalic metal borate, glycinate, or cyanide is observed. Electroosmotic flow carries the capillary effluent past the suppressor into a conductivity detection cell constituted by two platinum wires inserted through the wall of a poly(vinyl chloride) capillary. The system provides detection limits in the 10--20 [mu]g/L range for a variety of anions; a typical separation requires 15 min. Applicability to a variety of real samples is demonstrated. 26 refs., 10 figs.

• DOE Contract Number: FG05-84ER13281
• OSTI ID: 5848117
• Journal Information: Analytical Chemistry (Washington); (United States), Vol. 65:8; ISSN 0003-2700
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
CAPILLARIES
ELECTROPHORESIS
BORATES
CYANIDES
ION EXCHANGE MATERIALS
MEMBRANES
ORGANIC POLYMERS
SILICA
BLOOD VESSELS
BODY
BORON COMPOUNDS
CARDIOVASCULAR SYSTEM
CHALCOGENIDES
MATERIALS
MINERALS
ORGANIC COMPOUNDS
ORGANS
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
POLYMERS
SILICON COMPOUNDS
SILICON OXIDES
400102* - Chemical & Spectral Procedures
400400 - Electrochemistry