Electrospray
Electrospray — An ionization method that generates charged droplets from a liquid sample at atmospheric pressure, the most common ionization technique for peptide mass spectrometry.
What Is Electrospray Ionization?
Electrospray ionization (ESI) is the soft ionization technique that converts dissolved peptides into gas-phase multiply charged ions for mass spectrometry. ESI produces intact peptide ions without fragmentation, generates multiple charge states (enabling MW measurement of large peptides), and couples directly to LC for online analysis.
Features
- Multiple charges: [M+zH]z+ ions. MW calculated by deconvolution of charge state envelope
- Soft: Preserves non-covalent complexes for native MS studies of peptide-protein interactions
- Nano-ESI: Low-flow (nL/min) for maximum sensitivity in proteomics
Frequently Asked Questions
What is Electrospray?
An ionization method that generates charged droplets from a liquid sample at atmospheric pressure, the most common ionization technique for peptide mass spectrometry.
Why is Electrospray important in peptide research?
Electrospray is a fundamental concept in analytical as it relates to peptide science. It directly influences experimental design, compound characterization, and the reliability of research outcomes across biochemistry and molecular biology disciplines.