Differences in collision-induced dissociation of the protonated molecules of isomeric alkyl phenols

作者：Ukolov A I^*; Zenkevich I G

来源：Journal of Analytical Chemistry, 2014, 69(14): 1313-1319.

DOI：10.1134/S1061934814140123

• alkyl phenols
• chemical ionization
• protonated molecules
• collision-induced dissociation mass spectra
• identification

It is shown that isomeric ortho- and para-substituted alkyl phenols are characterized by significant differences in the collision-induced dissociation (CID) mass spectra of their protonated molecules formed at chemical ionization using methane as a reagent gas. Mass spectra of p-substituted isomers contain intensive peaks of characteristic ions [M + H - H2O](+), which are absent from the spectra of o-isomers. Such principal differences in CID mass spectra permit us to distinguish ortho-alkyl phenols from other isomers without using the MS reference data and/or chromatographic retention parameters.

• 出版日期2014-12