Metal Complex Separation with On-line Sample Preconcentration in Micellar Electrokinetic Chromatography

Metal complex separation with on-line sample preconcentration in micellar electrokinetic chromatography.

Micellar electrokinetic chromatography (MEKC) using a cationic surfactant as a pseudostationary phase was examined to separate anionic metal cyclohexane-1,2-diaminetetraacetic acid (CDTA) complexes. Cetyltrimethylammonium chloride (CTAC) was employed as the cationic surfactant micelle, its addition leading to EOF reversal. Cu(II), Co(II), Zn(II), Mn(II) and Pb(II) were used as test analytes, an...

Development of a Novel On-line Sample Preconcentration and Separation Technique in Microchip Micellar Electrokinetic Chromatography

Separation of dithiocarbamate metal complexes by micellar electrokinetic chromatography

Separation of a number of transition metal complexes with bis(2-hydroxyethyl)dithiocarbamate (HEDTC) by micellar electrokinetic capillary chromatography (MEKC) with direct photometric detection was investigated. Pre-capillary complexation was shown to be superior to on-capillary complexation in terms of the number of metals ions which could be detected and their peak shapes, enabling analysis o...

On-line preconcentration and determination of ketamine and norketamine by micellar electrokinetic chromatography. Complementary method to gas chromatography/mass spectrometry.

We have investigated a rapid, simple, and highly efficient on-line preconcentration method using in micellar electrokinetic chromatography (MEKC) for the analysis of abused drugs. Ketamine is an anesthetic that has been abused as a hallucinogen. We applied the sample sweeping technique first to ketamine and its major metabolite, norketamine, and separated the analytes with MEKC. Several of the ...

Separation of preservatives in cosmetic products by micellar electrokinetic chromatography.

This paper describes the methodological optimization and validation of a simple micellar electrokinetic chromatography for the rapid simultaneous separation of 2-methyl-4-isothiazolin-3-one, methylparaben, ethylparaben, propylparaben, and butylparaben. By using a 30 mM phosphate buffer (pH 7.2) containing 30 mM sodium dodecyl sulfate (SDS), an applied voltage of 10 kV and a separation temperatu...