This document introduces the mass analysis principles and features of the 5973N high resolution mass spectrometer, including electron bombardment ionization and chemical ionization.
This document explains the mechanisms for producing ions in mass spectrometry, specifically focusing on Electron Ionization (EI) and Chemical Ionization (CI). It details how these methods are utilized in the 5973 Network MSD instruments to aid in the selection of the appropriate instrument for specific customer applications.
The standard energy utilized for electron ionization is 70-eV.
The two approaches are positive chemical ionization (PCI) and electron-capture negative ion chemical ionization (ECNI).
Reagent gas is added to the ion source at pressures from about 0.1 Torr to 2 Torr.