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Microbore HPLC/mass spectrometry for the analysis of peptide mixtures using a continuous flow interface
Biochemical and Biophysical Research Communications
|July 15, 1987
Summary
This study introduces a sensitive method combining microbore High-Performance Liquid Chromatography (HPLC) with Fast Atom Bombardment Mass Spectrometry (FAB-MS) for analyzing peptides and small proteins. The technique successfully identified most peptides in a complex protein digest, demonstrating its high sensitivity and capability for high molecular weight compounds.
Area of Science:
- Analytical Chemistry
- Biochemistry
- Spectrometry
Background:
- Microbore High-Performance Liquid Chromatography (HPLC) is a powerful separation technique.
- Fast Atom Bombardment Mass Spectrometry (FAB-MS) is used for analyzing biomolecules.
- Combining these techniques offers enhanced analytical capabilities.
Purpose of the Study:
- To develop and demonstrate HPLC/MS capabilities for analyzing peptide and small protein mixtures.
- To evaluate the sensitivity and molecular weight detection range of the combined technique.
- To analyze complex biological samples like tryptic digests.
Main Methods:
- Utilized microbore HPLC coupled with FAB-MS.
- Employed a continuous flow direct insertion probe with a fused silica capillary interface.
- Operated the interface at low solvent flow rates (5-10 microL/min).
Main Results:
- Successfully analyzed mixtures of peptides and small proteins (900-6000 daltons).
- Identified 16 out of 19 expected peptides from a whale myoglobin tryptic digest (m/z 2200-250).
- Demonstrated high sensitivity due to low flow rates and low background.
Conclusions:
- The combined HPLC/MS approach provides high sensitivity for peptide and small protein analysis.
- This method is effective for analyzing complex biological digests.
- The technique is capable of detecting high molecular weight compounds.
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