Abstract
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.
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Original Russian Text © A.I. Ukolov, I.G. Zenkevich, 2014, published in Mass-spektrometria, 2014, Vol. 11, No. 1, pp. 29–34.
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Ukolov, A.I., Zenkevich, I.G. Differences in collision-induced dissociation of the protonated molecules of isomeric alkyl phenols. J Anal Chem 69, 1313–1319 (2014). https://doi.org/10.1134/S1061934814140123
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DOI: https://doi.org/10.1134/S1061934814140123