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Tandem mass spectrometry: applications and new instrumentation

Thesis/Dissertation ·
OSTI ID:6926065
Applications of tandem mass spectrometry (MS/MS) in complex mixture analysis and the development of a new MS/MS instrument are described. The MS/MS methodology is applied to the analysis of coal liquids and diesel particulates. Individual components are identified by daughter scans, while parent and neutral loss scans are used to screen the mixture for selected types of compounds. The selective ionization methods of negative chemical ionization and ammonia chemical ionization are employed to increase specificity in these analyses. High and low energy MS/MS data are compared for a group of isomeric pairs of methyl aza and amino polynuclear aromatic compounds. Quite different spectra are observed in the two energy regimes, however, in both regimes the isomers are distinguishable. A library of low energy MS/MS spectra is developed on a triple quadrupole mass spectrometer and is used for the identification of individual components in a diesel particulate sample.
Research Organization:
Purdue Univ., Lafayette, IN (USA)
OSTI ID:
6926065
Country of Publication:
United States
Language:
English