This document introduces the optimized sources for electron ionization (EI) and chemical ionization (CI) of Agilent 5973x gas chromatograph/mass selective detectors (GC/MSDs). It also demonstrates how to acquire high-quality EI spectra with the CI source without changing the sources. The experimental results show that using the CI source can obtain comparable major and minor peaks to the EI source.
The document explains how to configure an Agilent 5973x gas chromatograph/mass selective detector equipped with a Chemical Ionization (CI) source to acquire Electron Ionization (EI) spectra. This capability allows users to obtain both EI data for library searching and CI data for molecular weight information without physically swapping ionization sources.
The text provides specific tuning steps, including reducing the methane reagent gas flow rate and adjusting the repeller voltage. It presents experimental results showing total ion chromatograms and mass spectra for a fragrance mixture (Hexadecanolide), demonstrating that the acquired EI spectrum matches the NIST02 library reference with 98% quality.
| Document Date | January 30, 2004 |
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| Document Number | 5989-0595EN |
Yes, the Agilent 5973 inert MSD can acquire high-quality EI spectra with the CI source by adjusting settings like repeller voltage and gas flow.
Acquiring both types of data without changing sources results in increased productivity.