Structural analysis of tetrapyrroles by hydrogen chemical ionization mass spectrometry

GJ Shaw, G Eglinton, JME Quirke

Index: Shaw, George J.; Eglinton, Geoffrey; Quirke, J. Martin E. Analytical Chemistry, 1981 , vol. 53, # 13 p. 2014 - 2020

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Citation Number: 24

Abstract

The H2 chemical ionizatlon mass spectra of several standard porphyrins have been determined. Fragmentation proceeds via hydrogenation yielding porphyrlnogens, followed by cleavage at the meso (brldge) positions to produce mono-, dC, and trlpyrrollc Ions. Secondary fragmentation by cleavage of substituent groups attached to the pyrrole rings may then occur. Identiflcatlon of these fragments and the correspondlng molecular ions ...