High‐performance capillary electrophoretic separation of proteins and peptides using a bonded hydrophilic phase capillary

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Abstract
High performance capillary electrophoresis (HPCE) was applied to the separation of protein and peptide mixtures with molecular masses ranging from 1300 to 96000 Da using a new bonded hydrophilic phase capillary, CElect‐P150. This coated capillary reduces the interaction between proteins and silanol groups in capillary walls, allowing a complete recovery of the proteins and peptides of interest. HPCE was also used for the analysis of a complex mixture of tryptic fragments and to monitor the process of enzymatic digestion. Moreover, using a CElect‐P150 capillary, highly reproducible analysis was possible without preconditioning the capillary with acid or basic solutions before each new analysis.