Abstract
Abstract The analysis of sulfa drugs, using pulsed positive ion-negative ion chemical ionization (PPINICI) mass spectrometry (MS), generates both positive and negative spectra in a single experiment. The spectra afforded by PPINICI-MS permit systematic interpretation and prediction of fragmentation for this class of compounds. Comparison of the electron impact and PPINICI spectra of 17 sulfa drugs and selected derivatives demonstrates that the useful information available with this new technique exceeds that afforded by electron impact analysis.
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