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Optimization of capillary zone electrophoresis/electrospray ionization parameters for the mass spectrometry and tandem mass spectrometry analysis of peptides

Publication ,  Journal Article
Moseley, MA; Jorgenson, JW; Shabanowitz, J; Hunt, DF; Tomer, KB
Published in: Journal of the American Society for Mass Spectrometry
January 1, 1992

The solution chemistry conditions necessary for optimum analysis of peptides by capillary zone electrophoresis (CZE)/electrospray ionization mass spectrometry and CZE electrospray ionization tandem mass spectrometry have been studied. To maximize the signal-to-noise ratio of the spectra it was found necessary to use acidic CZE buffers of low ionic strength. This not only increases the total ion current, but it also serves to fully protonate the peptides, minimizing the distribution of ion current across the ensemble of possible charge states. The use of acidic buffers protonates the peptides, which is advantageous for mass spectrometry and tandem mass spectrometry analysis, but is problematic with CZE when bare fused silica CZE columns are used. These conditions produce positively charged peptides, and negatively charged silanol moieties on the column wall, inducing adsorption of the positively charged peptides, thus causing zone broadening and a loss in separation efficiency. This problem was circumvented by the preparation of chemically modified CZE columns, which, when used with acidic CZE buffers, will have a positively charged inner column wall. The electrostatic repulsion between the positively charged peptides and the positively charged CZE column wall minimizes adsorption problems and facilitates high efficiency separations. Full-scan mass spectra were acquired from injections of as little as 160 fmols of test peptides, with CZE separation efficiencies of up to 250,000 theoretical plates. © 1992 American Society for Mass Spectrometry.

Duke Scholars

Published In

Journal of the American Society for Mass Spectrometry

DOI

EISSN

1879-1123

ISSN

1044-0305

Publication Date

January 1, 1992

Volume

3

Issue

4

Start / End Page

289 / 300

Related Subject Headings

  • Analytical Chemistry
  • 3401 Analytical chemistry
  • 0306 Physical Chemistry (incl. Structural)
  • 0304 Medicinal and Biomolecular Chemistry
  • 0301 Analytical Chemistry
 

Citation

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Moseley, M. A., Jorgenson, J. W., Shabanowitz, J., Hunt, D. F., & Tomer, K. B. (1992). Optimization of capillary zone electrophoresis/electrospray ionization parameters for the mass spectrometry and tandem mass spectrometry analysis of peptides. Journal of the American Society for Mass Spectrometry, 3(4), 289–300. https://doi.org/10.1016/1044-0305(92)87056-5
Moseley, M. A., J. W. Jorgenson, J. Shabanowitz, D. F. Hunt, and K. B. Tomer. “Optimization of capillary zone electrophoresis/electrospray ionization parameters for the mass spectrometry and tandem mass spectrometry analysis of peptides.” Journal of the American Society for Mass Spectrometry 3, no. 4 (January 1, 1992): 289–300. https://doi.org/10.1016/1044-0305(92)87056-5.
Moseley MA, Jorgenson JW, Shabanowitz J, Hunt DF, Tomer KB. Optimization of capillary zone electrophoresis/electrospray ionization parameters for the mass spectrometry and tandem mass spectrometry analysis of peptides. Journal of the American Society for Mass Spectrometry. 1992 Jan 1;3(4):289–300.
Moseley, M. A., et al. “Optimization of capillary zone electrophoresis/electrospray ionization parameters for the mass spectrometry and tandem mass spectrometry analysis of peptides.” Journal of the American Society for Mass Spectrometry, vol. 3, no. 4, Jan. 1992, pp. 289–300. Scopus, doi:10.1016/1044-0305(92)87056-5.
Moseley MA, Jorgenson JW, Shabanowitz J, Hunt DF, Tomer KB. Optimization of capillary zone electrophoresis/electrospray ionization parameters for the mass spectrometry and tandem mass spectrometry analysis of peptides. Journal of the American Society for Mass Spectrometry. 1992 Jan 1;3(4):289–300.
Journal cover image

Published In

Journal of the American Society for Mass Spectrometry

DOI

EISSN

1879-1123

ISSN

1044-0305

Publication Date

January 1, 1992

Volume

3

Issue

4

Start / End Page

289 / 300

Related Subject Headings

  • Analytical Chemistry
  • 3401 Analytical chemistry
  • 0306 Physical Chemistry (incl. Structural)
  • 0304 Medicinal and Biomolecular Chemistry
  • 0301 Analytical Chemistry