Simultaneous determination of ingredients in an ointment by hydrophobic interaction electrokinetic chromatography

Recent Advances in the Analysis of Steroid Hormones and Related Drugs

“…The migration behavior of the hydrophobic and ionic constituents was influenced by the concentration of tetradecyl ammonium bromide and ammonium chloride, respectively. 212 On-line sample preconcentration (370-fold improvement in detector response) was achieved for steroids by sweeping with anionic-zwitterionic micelles. 213 Chiral aspects of MEKC are shown in the section "Enantiomeric analysis".…”

Separation methods for taurine analysis in biological samples

“…At present, seven researches [10,18,22,[65][66][67] dealing with the analysis or identification [68] of taurine in biological samples have been reported. Among the above mentioned pre-column derivatization reagents, only fluorescamine is a suitable derivatization regent for CE analysis.…”

“…Samples (10 ml) were separated preparations high. Therefore, Okamoto et al [67] on a Capcell Pak NH column at 40 8C with 2 mM effective for the analysis of taurine in biological determine sugars in nonalcoholic beverage. The samples.…”

Characterization of hydroxyaromatic compounds in vegetable oils by capillary electrophoresis with direct injection in an oil‐miscible KOH/propanol/methanol medium

“…Separation in MEEKC was based on the partition of the solutes between the disperse phase, constituted by the droplet cores, and the continuous aqueous phase, whose lipophilicity was tuned to that of the solutes by adding up to 20% 2-propanol [45]. a-Tocopheryl acetate and other active ingredients have also been separated in the methanolic extract of an ointment by hydrophobic interaction electrokinetic chromatography (HIEKC) [46]. In HIEKC, separations are performed in a mixed acetonitrile-(ACN)-water medium, in the presence of either a tetraalkylammonium ion or cetyltrimethylammonium bromide [46].…”

“…a-Tocopheryl acetate and other active ingredients have also been separated in the methanolic extract of an ointment by hydrophobic interaction electrokinetic chromatography (HIEKC) [46]. In HIEKC, separations are performed in a mixed acetonitrile-(ACN)-water medium, in the presence of either a tetraalkylammonium ion or cetyltrimethylammonium bromide [46].…”