Electron ionization mass spectra and their reproducibility for trialkylsilylated derivatives of organic acids, sugars and alcohols

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Eur. J. Mass Spectrom. 9, 487 - 495 (2003)
DOI: 10.1255/ejms.580

Electron ionization mass spectra and their reproducibility for trialkylsilylated derivatives of organic acids, sugars and alcohols

Tim G. Sobolevsky, Elena S. Chernetsova,^* Alexander I. Revelsky and Igor A. Revelsky
Moscow State University, Chemistry Department, Chair of Analytical Chemistry, Leninskie Gory 1, bld. 2, 119992 GSP-2 Moscow, Russian Federation. E-mail: revelsky @environment.chem.msu.ru
Alexander B. Starostin
Institute of Mechanics, Moscow State University, 1-112B Michurinskiy prosp., Moscow 117192, Russian Federation
Barbara Miller and Vincent Oriedo
The Dow Chemical Corporation, Dow Building 1707, Industrial BioMaterials Platform, Midland, MI 48674, USA

ABSTRACT:

Mass spectra of trialkylsilyl derivatives of fatty acids, dicarboxylic acids, hydroxyacids, oxoacids, sugars, amino acids and alcohols were obtained. Amino acids were analyzed as tert-butyldimethylsilyl derivatives; all other model compounds were analyzed as trimethylsilyl derivatives. Reproducibility of the electron ionization (EI) mass spectra for the derivatives obtained was discussed. It was shown that, for many investigated derivatives, composition of the respective mass spectra depended greatly on ion source contamination. The trimethylsilylated α-tocopherol mass spectrum composition was most significantly influenced by ion source contamination. This compound can be used to test ion source contamination.

Keywords: electron ionization, gas chromatography/mass spectrometry, fatty acids, dicarboxylic acids, hydroxyacids, oxoacids, sugars, amino acids, alcohols, trimethylsilyl derivatives, tert-butyldimethylsilyl derivatives, mass spectrum reproducibility

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