title: Highly charged polyelectrolyte coatings to prevent adsorption during protein and peptide analysis in capillary electrophoresis.
abstract: Capillary electrophoresis (CE) is an interesting technique for protein and peptide analysis. However, one of the major problems concerns sample adsorption on the internal capillary wall. The use of non-covalent coatings using highly charged polyelectrolytes is an efficient, simple, and fast approach to reduce peptide and protein adsorption phenomena. We have studied in a systematic manner the effect of coating conditions on the stability and efficiency of multilayer coatings using poly(diallyldimethylammonium) chloride (PDADMAC) as polycation and polystyrene sulfonate (PSS) as polyanion. When optimal conditions defined in the protocols are used, very stable coatings are obtained and adsorption phenomena are eliminated. The coatings are stable over a large range of pH buffer (2-10) and in the presence of organic solvent. Hundreds of analyses can be performed without coating regeneration. Coated capillaries can be easily stored and reused.
authors: Institut de Chimie Organique et Analytique (ICOA), Université d'Orléans, UMR CNRS 7311, Orléans, France.
authors: Reine
authors: R
authors: Nehmé
authors: Catherine
authors: C
authors: Perrin
mesh_terms: D000327:Adsorption; D053841:Electroosmosis; D019075:Electrophoresis, Capillary / Q000379:methods; D006863:Hydrogen-Ion Concentration; D010455:Peptides / Q000032:analysis* / Q000737:chemistry; D011095:Polyethylenes / Q000737:chemistry; D011137:Polystyrenes / Q000737:chemistry; D011506:Proteins / Q000032:analysis* / Q000737:chemistry; D000644:Quaternary Ammonium Compounds / Q000737:chemistry; D012822:Silicon Dioxide / Q000737:chemistry; D012996:Solutions; D013499:Surface Properties
chemical_list: D010455:Peptides; D011095:Polyethylenes; D011137:Polystyrenes; D011506:Proteins; D000644:Quaternary Ammonium Compounds; D012996:Solutions; C041004:poly-N,N-dimethyl-N,N-diallylammonium chloride; C003321:polystyrene sulfonic acid; D012822:Silicon Dioxide