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High pressure differential thermal analysis (HPDTA) of fatty acid methyl esters and triglycerides
Author(s) -
Yamazaki Megumi,
Nagao Akihiko,
Komamiya Kogaku
Publication year - 1980
Publication title -
journal of the american oil chemists' society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.512
H-Index - 117
eISSN - 1558-9331
pISSN - 0003-021X
DOI - 10.1007/bf02674360
Subject(s) - exothermic reaction , chemistry , differential thermal analysis , atmospheric pressure , thermodynamics , line (geometry) , tangent , analytical chemistry (journal) , materials science , mathematics , chromatography , organic chemistry , physics , geometry , diffraction , meteorology , optics
When using high pressure differential thermal analysis to study the stability of a fatty methyl ester or triglyceride in an atmosphere of air, a departure from the base line in the exothermic curve is observed. The point where an extension line from the base line intersects a tangent line to the departure curve was selected as the transition point in the exothermic curve. For each sample studied, temperature at this transition point showed good reproducibility. The influence of sample container and air pressure upon the temperature of the transition point in the exothermic curve (TTE) was examined. A linear correlation between the number of double bonds in the sample and TTE was observed.