Trace LC/MS quantitative analysis of polypeptide biomarkers: Impact of 1-D and 2-D chromatography on matrix effects and sensitivity

Eduard Rogatsky, Vlad Tomuta, Harsha Jayatillake, Greg Cruikshank, Louis Vele, Daniel T. Stein

Research output: Contribution to journalArticle

15 Scopus citations

Abstract

We investigated the impact of one dimension (single reverse phase (RP) column) and two dimension (two different RP columns) chromatographic methods on SIM (MS) and multiple reaction monitoring (MRM; MS/MS) performance from human plasma. We find that MRM analysis is clearly preferable for 1-D applications; however, implementation of SIM detection in conjunction with 2-D separation technique resulted in an over 60-fold increase in analyte peak area and improved S/N compared to MRM for our analyte, human C-peptide. Implementation of a 2-D RP-RP technique with SIM detection is capable of eliminating matrix effects and greatly increases signal response and data quality. For two large peptides in complex biological samples, we found that a 2-D approach performed better than high quality sample preparation together with 1-D chromatography and MRM, even on a high-end mass spectrometer.

Original languageEnglish (US)
Pages (from-to)226-233
Number of pages8
JournalJournal of Separation Science
Volume30
Issue number2
DOIs
StatePublished - Feb 1 2007

Keywords

  • C-peptide
  • Column switching
  • Ionization efficiency
  • Mass spectrometry
  • Matrix effects

ASJC Scopus subject areas

  • Analytical Chemistry
  • Filtration and Separation

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