ESI-MS (Electrospray Ionization Mass Spectrometry)
ESI-MS (Electrospray Ionization Mass Spectrometry) — An analytical technique that ionizes molecules in solution using an electrospray, widely used for confirming peptide molecular weight and identity.
What Is ESI-MS?
Electrospray ionization mass spectrometry (ESI-MS) is the dominant MS technique for peptide analysis. ESI converts solution-phase peptides into gas-phase multiply charged ions for mass measurement. ESI-MS provides molecular weight confirmation, purity assessment, and couples directly to LC for chromatographic analysis.
Features
- Multiple charges: Peptides carry z = +2 to +6 charges depending on size and basic residues
- Deconvolution: Software converts charge state envelope to neutral MW
- Sensitivity: Femtomole level detection with nano-ESI
Frequently Asked Questions
What is ESI-MS (Electrospray Ionization Mass Spectrometry)?
An analytical technique that ionizes molecules in solution using an electrospray, widely used for confirming peptide molecular weight and identity.
Why is ESI-MS (Electrospray Ionization Mass Spectrometry) important in peptide research?
ESI-MS (Electrospray Ionization Mass Spectrometry) 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.
Authority Sources
- ESI-MS (Electrospray Ionization Mass Spectrometry) on Wikipedia
- Search ESI-MS (Electrospray Ionization Mass Spectrometry) on PubChem (NIH)
- Research articles on ScienceDirect