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- W2038262912 abstract "Capillary electroendoendosmotic chromatography (CEC), being a hybrid of high-performance liquid chromatography (HPLC) and capillary electrophoresis, offers considerable changes to enhance column efficiency, speed of analysis and additional selectivity as compared to the parent methods. The analytes are driven by the electroendosmotic flow (EOF) and separated by surface-solute interactions as well as by differences in electromigration. In this paper on the separation of peptides on C18 reversed-phase and mixed-mode (sulphonic acid-n-alkyl) packings in CEC and electrically assisted reversed-phase gradient nano-LC are investigated. It is shown that mixed mode packings generate a higher EOF than reversed-phase packings that is scarcely dependent on the pH of the eluent. Applying a potential in gradient elution reversed-phase nano-LC of peptides shortens the analysis time as compared to separations without a potential. Electrically assisted reversed-phase gradient elution nano-LC is a powerful separation tool for analysis of tryptic digests. Peptides can be successfully resolved in acidic organic mobile phase at pH 2-3 with and without trifluoroacid as ion pairing reagent under isocratic conditions. It is demonstrated that CEC with mixed mode packing and an eluent of pH 2.3 with varying acetonitrile content can be applied to monitor impurities in a synthetic peptide." @default.
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- W2038262912 date "2000-10-01" @default.
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- W2038262912 title "Comparative study of capillary electroendosmotic chromatography and electrically assisted gradient nano-liquid chromatography for the separation of peptides" @default.
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- W2038262912 doi "https://doi.org/10.1016/s0021-9673(00)00367-8" @default.
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