Abstract
The high resolution of capillary zone electrophoresis/mass spectrometry (CZE/MS) offers a promising technique to characterize biomolecules in pharmaceutical and biotechnology industries. A novel capillary zone electrophoresis/electrospray ionization time-of-flight mass spectrometry (CZE/ESI-TOFMS) interface was designed in this study to successfully integrate ESI-TOFMS, nanospray, and CZE for biomolecular identification. The interface offers a novel way to take advantage of the high resolution separation achieved during CZE and the detection sensitivity of nanospray ESI-MS. The results showed mixtures of peptides were highly resolved within a few minutes (each CZE electropherogram of a peptide is 2-3 seconds). The novel CZE/ESI-TOFMS interface may simultaneously provide sensitivity, data acquisition speed, mass range, and mass resolution while maintaining resolution of the CZE separation.
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