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Quantitative variability in the 252 Cf plasma desorption mass spectra of triglycerides and waxes
Author(s) -
Showell John S.,
Fales Henry M.,
Sokoloski Edward A.
Publication year - 1989
Publication title -
organic mass spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.475
H-Index - 121
eISSN - 1096-9888
pISSN - 0030-493X
DOI - 10.1002/oms.1210240820
Subject(s) - wax , desorption , mass spectrometry , analytical chemistry (journal) , ion , thermal desorption , mass spectrum , phase diagram , glyceride , chemistry , plasma , chromatography , thermal analysis , phase (matter) , thermal , adsorption , thermodynamics , organic chemistry , physics , fatty acid , quantum mechanics
Abstract A series of mixtures of solid triglycerides and waxes are examined using 252 Cf plasma desorption mass spectrometry. The relative abundances of diagnostic ions are found to vary with sample preparation, handling, and composition. It is proposed that the less efficiently packing, shorter chain, compounds are forced to the analysis site, i.e. the surface. This takes place at varying rates that reflect the bulk properties of the mixture as revealed by its phase diagram and thermal history. Mixtures that remain liquids during analysis show ion abundances correctly reflecting their composition. Mixtures of isotopomeric glycerides also show normal ion abundances.