Mass spectrometry of uronic acid derivatives: VI—Fragmentation of methyl(methyl 2,3,4‐tri‐O‐methyl‐α‐D‐glucopyranosid)uronate and its analytical application

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Abstract
The fragmentation mechanisms of the title compound upon impact with 70 and 12 eV electrons has been studied using specific trideuteriomethyl derivatives. By application of the proposed fragmentation mechanisms, the number as well as the location of methyl groups in all theoretically possible methyl derivatives of methyl D‐glucopyranos duronic acid unequivocally can be determined after exhaustive trideuteriomethylation. For this purpose low energy (12 eV) spectra are recommended, as these contain only the structurally significant ions.