✦ LIBER ✦

A mass spectrometric study of the pyrolysis of gibberellic acid

✍ Scribed by Roger J. Greathead; Rod S. Mason; Keith R. Jennings; Janet A. Page; Robert J. Pryce

Publisher: John Wiley and Sons
Year: 1985
Tongue: English
Weight: 381 KB
Volume: 20
Category: Article
ISSN: 1076-5174
DOI: 10.1002/oms.1210200208

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✦ Synopsis

The behaviour of gibberellic acid (GA,) under electron impact and chemical ionization conditions has been examined. The tendency of GA, to undergo pyrolysis by the loss of the elements of water and carbon dioxide has been identified. Two methods of sample introduction can be used to minimize the occurrence of this pyrolysis. Accurate mass measurement allows the composition of the pyrolysis product to be determined and metastable techniques confirm the structure of this product to be epi-allogibberic acid rather than its isomer allogibberic acid. This result correets a misconception in the literature and illustrates the advantage of metastable methods compared with accurate mass measurements, for the determination of small structural differences within a molecule.

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