Related Experiment Video
Updated: Jul 21, 2026

Sheathless Capillary Electrophoresis–Mass Spectrometry for Metabolic Profiling of Biological Samples
Published on: October 1, 2016
Capillaries modified by noncovalent anionic polymer adsorption for capillary zone electrophoresis, micellar
L Bendahl1, S H Hansen, B Gammelgaard
1Department of Analytical and Pharmaceutical Chemistry, Royal Danish School of Pharmacy, Copenhagen, Denmark. labe@mail.dfh.dk
Abstract:
A simple coating procedure for generation of a high and pH-independent electroosmotic flow in capillary zone electrophoresis (CZE) and micellar electrokinetic capillary chromatography (MEKC) is described. The bilayer coating was formed by noncovalent adsorption of the ionic polymers Polybrene and poly(vinylsulfonate) (PVS). A stable dynamic coating was formed when PVS was added to the background electrolyte. Thus, when the PVS concentration in the background electrolyte was optimized for CZE (0.01%), the EOF differed less than 0.3% after 54 runs. The electroosmotic mobility in the coated capillaries was (4.9+/-0.1) x 10(-4) cm2V(-1)s(-1) in a pH-range of 2-10 (ionic strength = 30 mM). When alkaline compounds were used as test substances intracapillary and intercapillary migration time variations (n = 6) were less than 1% relative standard deviation (RSD) and 2% RSD, respectively in the entire pH range. The coating was fairly stable in the presence of sodium dodecyl sulfate, and this made it possible to perform fast MEKC separations at low pH. When neutral compounds were used as test substances, the intracapillary migration time variations (n = 6) were less than 2% RSD in a pH range of 2-9. In addition to fast CZE and MEKC separations at low pH, analysis of the alkaline compounds by CE-MS was also possible.
More Related Videos
10:05Large-scale Top-down Proteomics Using Capillary Zone Electrophoresis Tandem Mass Spectrometry
Published on: October 24, 2018
07:54Capillary Electrophoresis Mass Spectrometry Approaches for Characterization of the Protein and Metabolite Corona Acquired by Nanomaterials
Published on: October 27, 2020
Related Concept Videos
Analyte Adsorption and Distribution
Ion-Exchange Chromatography
Size-Exclusion Chromatography
Silica particles offer advantages such as rigidity,...
Electrophoresis: Overview
There...
Capillary Electrophoresis: Instrumentation
Capillary Electrophoresis: Applications
Capillary zone electrophoresis (CZE) separates ionic components based on their electrophoretic mobility. It has been used to separate proteins, amino acids,...