Results 171 to 180 of about 3,056 (209)

Separation of cardiac glycosides by micellar electrokinetic chromatography and microemulsion electrokinetic chromatography

Journal of Chromatography A, 1997
The interest of micellar electrokinetic chromatography (MEKC) and microemulsion electrokinetic chromatography (MEEKC) for the resolution of four cardiac glycosides is demonstrated. First, the influence of some parameters on the resolution of the solutes in MEKC such as the concentration of the surfactant, pH, addition of organic modifiers and urea is ...
L, Debusschère, C, Demesmay, J L, Rocca, G, Lachatre, H, Lofti   +4 more
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Selectivity manipulation in micellar electrokinetic chromatography

Journal of Pharmaceutical and Biomedical Analysis, 1992
Micellar electrokinetic chromatography (MEKC) permits the separation of electrically neutral analytes by chromatographic principles in a capillary electrophoresis system. The most effective way to obtain high resolution in MEKC is to increase the separation factor, as in conventional chromatography.
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Micellar electrokinetic chromatography of proteins

Journal of Chromatography A, 1997
Abstract Micellar electrokinetic capillary chromatography (MECC) of proteins is a high resolution capillary electrophoretic (CE) analysis method that utilizes the hydrophobic and electrostatic interaction of protein analytes with surfactant micelles present in the buffer medium to facilitate separation. Through the manipulation of the protein-micelle
Mark A. Strege, Avinash L. Lagu
openaire   +1 more source

Characterization of micellar solubilization of antibiotics using micellar electrokinetic chromatography

Journal of Pharmaceutical and Biomedical Analysis, 2001
Micellar electrokinetic chromatography (nMEKC) method was applied to the determination of the partition behaviour between water and micelle for a group of antibiotics using sodium dodecyl sulphate (SDS) as an anionic model surfactant. In the method, the running buffer contains both the micelles and the drug, and the injected solution contains the same ...
Y, Mrestani, Z, Marestani, R H, Neubert
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The use of mixed surfactants in micellar electrokinetic chromatography

ELECTROPHORESIS, 1994
AbstractThe use of mixed surfactants for the separation of nine phenylthiohydantoin amino acids (PTH amino acids) by micellar electrokinetic chromatography (MEKC) was examined. The potential of a mixed surfactant system, consisting of cationic and anionic surfactants, for enhancing the selectivity of MEKC separations was explored.
C P, Ong, C L, Ng, H K, Lee, S F, Li
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Separation of fungicides by micellar electrokinetic capillary chromatography

ELECTROPHORESIS, 1997
AbstractCapillary electrophoresis with ultraviolet detection (CE/UV) of selected fungicides (carbendazim, metalaxyl, propiconazole, and vinclozolin) using different buffer compositions was investigated. Capillary zone electrophoresis (CZE) with 10 mM sodium phosphate (pH 7.0) was not useful in separating the four fungicides used in this study. However,
K V, Penmetsa, R B, Leidy, D, Shea
openaire   +2 more sources

Analysis of arylamine isomers by micellar electrokinetic chromatography

ELECTROPHORESIS, 2002
Analysis of carcinogenic substances is a high-priority area. Carcinogenic arylamines draw the analyst's attention because dyes and pigments are in production and used in large volumes. Identification of carcinogenic isomers of arylamines employing micellar electrokinetic chromatography (MEKC), a mode of capillary electrophoresis was studied as it ...
Rama Jeevan Ganesh, Jeevan, Malayappan, Bhaskar, Raghavan, Chandrasekar, Ganga, Radhakrishnan   +3 more
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Application of micellar electrokinetic chromatography to pharmaceutical analysis

ELECTROPHORESIS, 1990
AbstractElectrokinetic chromatography is a new type of analytical separation method which belongs to the group of high performance capillary electrophoretic techniques but whose separation principle is based on that of chromatography. The solute distributes itself between a carrier and the surrounding medium.
H, Nishi, S, Terabe
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Optimization of micellar electrokinetic chromatography

Analytical Chemistry, 1990
surfactant concentratlon to use. Another equatlon Is dedved that relates the analysts time to flve parameters: R,, a (rdectlvlty), & r, fJfm, and H/v, (plate helght/electroo#notlc vdoclty). The capacity factor for the best tusddbn k glven by k = (fJfo)1'2, where 1, and I, are the retentbn times of the aqueous and mlceHar phases, respectively.
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Analysis of prostaglandins by micellar electrokinetic capillary chromatography

Journal of Chromatography A, 1997
This paper presents a rapid and reliable micellar electrokinetic capillary chromatography (MEKC) method to separate major prostaglandins and thromboxane B2. The running buffer was modified with sodium dodecyl sulfate (SDS). The effects of the SDS concentration on the migration behavior of analytes was also examined.
Y Z, Hsieh, K L, Kuo
openaire   +2 more sources