Differentiation among Isomeric Polyfunctional Nitroaromatics by Dimethyl Ether Chemical Ionization Mass Spectrometry in a Conventional Ion Source
Abstract
Since aromatic positional isomers frequently cannot be reliably distinguished by their electron ionization (EI) or chemical ionization (CI) mass spectra, interest in new selective CI reagents has been widespread. Among the most recent and promising were nitric oxide using a Townsend discharge technique and dimethyl ether (DME) in a quadrupole ion trap mass spectrometer (ITMS). For a number of difunctional oxyaromatics in the ITMS, the adduct ions resulting from ion-molecule reactions with reagent-derived ions demonstrated both functional group and positional selectivity, whereas in a conventional ion source no structural selectivity was observed. The adduct ions observed were M + 1+, M + 13 +, M + 15 +, M + 45 + and M + 47 + (proton, methine, methyl, methoxymethylene and protonated DME adducts).
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1992
- Accession Number
- ADA252815
Entities
Organizations
- United States Army Biological Warfare Laboratories