Zeitschrift für Naturforschung A · 1966 · 17 citations · 0 references
Natural SciencesChemistryMaterials ScienceAnalytical ChemistryMass Spectrometric AnalysisPhysical ChemistryMass SpectrometrySurface PhysicsSurface SpectroscopyAdsorbent CharacterizationAdsorption On Metal SurfacesAdsorption PropertiesAliphatic HydrocarbonsMass Spectral IdentificationMass Spectral InterpretationMass Spectrometric IdentificationMass Spectrometry Characterization
The field ion (FI) mass spectra of aliphatic alcohols from methanol to n-decanol are discussed. The influence of the ion emitter geometry and metal was investigated. Tips as well as thin wires were used as FI emitters. The wires consisted of platinum only, whereas platinum, gold and tungsten were used as emitter tip metals. The difference of the FI mass spectra with tip and wire emitters are mainly due to the difference in field strengths, which are usually lower with wires. The differences of the spectra with platinum and gold tips are correlated with differences in adsorption properties of these metals. The main ions in the FI mass spectra of alcohols besides the molecular ions M are: 2M + 1, M + 1, M — 1, M — 2, C n H 2n+1 and (CH 2 ) n OH with varying n-values. The mechanisms of formation of these ions are discussed.