scholarly journals Characterization of Diblock Copolymers by Capillary Electrophoresis: From Electrophoretic Mobility Distribution to Distribution of Composition

2019 ◽  
Vol 53 (1) ◽  
pp. 334-345
Author(s):  
Anthony Phimphachanh ◽  
Joseph Chamieh ◽  
Laurent Leclercq ◽  
Simon Harrisson ◽  
Mathias Destarac ◽  
...  
Keyword(s):  
Capillary Electrophoresis ◽  
Electrophoretic Mobility ◽  
Diblock Copolymers

Characterization of rhinovirus subviral A particles via capillary electrophoresis, electron microscopy and gas phase electrophoretic mobility molecular analysis: Part II

2013 ◽  
Vol 34 (11) ◽  
pp. 1600-1609 ◽  
Author(s):  
Xavier Subirats ◽  
Victor U. Weiss ◽  
Irene Gösler ◽  
Christoph Puls ◽  
Andreas Limbeck ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Capillary Electrophoresis ◽  
Gas Phase ◽  
Electrophoretic Mobility ◽  
Molecular Analysis

scholarly journals Separation and Characterization of Highly Charged Polyelectrolytes Using Free-Solution Capillary Electrophoresis

Polymers ◽  
2018 ◽  
Vol 10 (12) ◽  
pp. 1331
Author(s):  
Isabelle Desvignes ◽  
Joseph Chamieh ◽  
Hervé Cottet
Keyword(s):  
Capillary Electrophoresis ◽  
Ionic Strength ◽  
Charge Density ◽  
Electrophoretic Mobility ◽  
Separation Mechanism ◽  
Free Solution ◽  
Counterion Condensation ◽  
Charge Densities ◽  
Effective Mobility

The characterization of statistical copolymers of various charge densities remains an important and challenging analytical issue. Indeed, the polyelectrolyte (PE) effective electrophoretic mobility tends to level off above a certain charge density, due to the occurrence of Manning counterion condensation. Surprisingly, we demonstrate in this work that it is possible to get highly resolutive separations of charged PE using free-solution capillary electrophoresis, even above the critical value predicted by the Manning counterion condensation theory. Full separation of nine statistical poly(acrylamide-co-2-acrylamido-2-methylpropanesulfonate) polymers of different charge densities varying between 3% and 100% was obtained by adjusting the ionic strength of the background electrolyte (BGE) in counter electroosmotic mode. Distributions of the chemical charge density could be obtained for the nine PE samples, showing a strong asymmetry of the distribution for the highest-charged PE. This asymmetry can be explained by the different reactivity ratios during the copolymerization. To shed more light on the separation mechanism, effective and apparent selectivities were determined by a systematic study and modeling of the electrophoretic mobility dependence according to the ionic strength. It is demonstrated that the increase in resolution with increasing BGE ionic strength is not only due to a closer matching of the electroosmotic flow magnitude with the PE electrophoretic effective mobility, but also to an increase of the dependence of the PE effective mobility according to the charge density.

Characterization of rhinovirus subviral A particles via capillary electrophoresis, electron microscopy and gas-phase electrophoretic mobility molecular analysis: Part I

2012 ◽  
Vol 33 (12) ◽  
pp. 1833-1841 ◽  
Author(s):  
Victor U. Weiss ◽  
Xavier Subirats ◽  
Angela Pickl-Herk ◽  
Gerhard Bilek ◽  
Wolfgang Winkler ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Capillary Electrophoresis ◽  
Gas Phase ◽  
Electrophoretic Mobility ◽  
Molecular Analysis

Capillary electrophoresis applied to analysis and characterization of mono-N-acyl-2,6-diaminopimelic acid derivatives

2011 ◽  
Author(s):  
Miloslava Vítovcová ◽  
Jan Hlaváček ◽  
Jan Pícha ◽  
Václav Vaněk ◽  
Jiří Jiráček ◽  
...  
Keyword(s):  
Capillary Electrophoresis ◽  
Diaminopimelic Acid
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