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Surface effects in fast atom bombardment mass spectrometry of ethylene glycol-glycerol mixtures

✍ Scribed by Gunther Dube; Dieter Vollhardt

Publisher
John Wiley and Sons
Year
1990
Tongue
English
Weight
430 KB
Volume
25
Category
Article
ISSN
1076-5174

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✦ Synopsis

Binary mixtures of ethylene glycols HO(CH,CH,O)=H (x = 3-5) with glycerol were investigated by fast atom bombardment mass spectrometry. The relative intensities in the ethylene glycol partial mass spectra as a function of concentration exhibit a steep slope in the low concentration range. With increasing concentration the curves asymptotically approach the 100% line. This effect increases from triethyleae to pentaethyleae glycol. Comparison of these results with those of surface tension measurements leads to the conclusion that the high sensitivity of fast atom bombardment mass spectrometry for ethylene glycols is caused by the surface-active properties of these compounds, which lead to an enrichment of the surface investigated with the substance molecules.

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