Electrokinetic chromatography with micellar solution and open-tubular capillary

Journal Article · Mon Apr 01 04:00:00 EST 1985 · Anal. Chem.; (United States)

DOI:https://doi.org/10.1021/ac00281a014· OSTI ID:5524895

Terabe, S; Otsuka, K; Ando, T

Fundamental characteristics of a new type of chromatography with micellar solutions of ionic surfactants were examined. Electrokinetic phenomena in open-tubular capillaries move two phases, aqueous and micellar, with different velocities and micellar solubilization operates as the distribution process of solutes. Sodium dodecyl sulfate (SDS) solutions and a 0.05 mm i.d. x 650 mm fused silica tube were employed and high dc voltages up to 25 kV were applied. Linear relationships were observed between current and migration velocities of water, micelle, and any solute, but not between applied voltages and the velocities. This discrepancy can be reasonably interpreted in terms of the temperature rise of the solution in the tube resulting from Joule heating. Optimum resolutions can be obtained when the capacity factor is about 2, because retention times are limited between those of an insolubilized solute or water and a totally solubilized solute or micelle. Observed dependence of capacity factors on current can also be explained by the temperature rise. Thermodynamic parameters in micellar solubilization were presented. 22 references, 10 figures, 4 tables.

• Research Organization: Kyoto Univ., Japan
• OSTI ID: 5524895
• Journal Information: Anal. Chem.; (United States), Journal Name: Anal. Chem.; (United States) Vol. 57:4; ISSN ANCHA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400102 -- Chemical & Spectral Procedures
400400* -- Electrochemistry
ALCOHOLS
ALKALI METAL COMPOUNDS
ALKYLATED AROMATICS
AMINES
ANILINE
AQUEOUS SOLUTIONS
AROMATICS
CHALCOGENIDES
CHEMICAL REACTION KINETICS
CHEMISTRY
CHROMATOGRAPHY
DATA
DEVELOPERS
DISPERSIONS
ELECTROCHEMISTRY
EXPERIMENTAL DATA
HYDROCARBONS
HYDROXY COMPOUNDS
INFORMATION
KINETICS
LIQUID COLUMN CHROMATOGRAPHY
MATHEMATICAL MODELS
METHANOL
MICELLAR SYSTEMS
MINERALS
MIXTURES
NAPHTHOLS
NITRO COMPOUNDS
NITROBENZENE
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PH VALUE
PHASE STUDIES
PHENOL
PHENOLS
PHYSICAL PROPERTIES
POLYPHENOLS
REACTION KINETICS
RESORCINOL
SEPARATION PROCESSES
SILICA
SILICON COMPOUNDS
SILICON OXIDES
SODIUM COMPOUNDS
SOLUTES
SOLUTIONS
SOLVENT PROPERTIES
SULFATES
SULFUR COMPOUNDS
SURFACTANTS
TEMPERATURE DEPENDENCE
THERMODYNAMIC PROPERTIES
TIME DEPENDENCE
TOLUENE
VELOCITY