Mass Spectrometer Analysis of Alcohols and Other Oxygenated Derivatives

Mass Spectrometer Analysis of Some Oxygenated Compounds. The Sorption Problem

“…Their parent masses (molecular weight calculated using atomic weights of most abundant isotopes-e.g., 32 for methanol) are all two units above the parent masses of the paraffin series. As shown in previously published data (5,6,12), it is clear that peaks one and two units above the paraffinic parent masses are most typical. These compounds are therefore easily recognized as a group in mixtures of hydrocarbons.…”

“…Polar compounds, such as those containing a hydroxyl or amine group, were the most strongly sorbed and in general the degree of sorption increased with molecular weight. Techniques by which sorption can be reduced were developed in several laboratories (5,6,8,12).…”

The use of mass spectrometry in organic analysis

“…Stereoisomers usually fall into this category, for example, cisand trans-2butene, A simitar difficulty is encountered with positional isomers among olefins and alkylbenzenes; thus there are no salient differences between the mass spectra of 1-butene and 2-butene or between m-diethytbenzene and p-diethylbenzene. Sorption on the glass walls of the mass spectrometer assembly may cause difficulty in the analysis of oxygenated compounds (24,26). Because of this, mixtures of light and heavy water cannot readily be analyzed by mass spectrometry (18).…”

Green Lemon Mold, Gaseous Emanation Products

“…The spectra shown in Figures 4 to 10 represent the difference between the observed spectrum and the background spectrum of the instrument used. The following interpretations are made (7,8,11)•.…”