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Н. С. Настасієнко, Т. В. Фесенко, С. В. Снегір, В. О. Покровський
«Особливості йоноутворення поліолів у мас-спектрометрії з лазерною десорбцією/йонізацією»
533–541 (2012)

PACS numbers: 34.50.Gb, 34.50.Rk, 68.49.Sf, 82.30.Fi, 82.50.Hp, 82.80.Ms, 82.80.Rt

The results of mass spectrometry investigation of polyols, namely, sorbitol, koenlinite, and mannitol obtained by means of laser desorption/ionization (LDI) mass spectrometry, matrix-assisted laser desorption/ionization (MALDI) mass spectrometry, graphite-assisted laser desorption/ionization (GALDI) mass spectrometry, are presented. As revealed, the formation of positive ion of polyols occurs by means of association with sodium and potassium cations, while formation of negative ion is the result of polyols’ deprotonating. Comparison of mass spectrometry data obtained by various methods proves that application of graphite as the matrix in GALDI MS is the most efficient method for polyols’ investigation. This effect is associated with field desorption of polyols caused by the interaction of laser irradiation with nanoscale defects of graphite surface.