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Capillary gas chromatography‐mass spectrometry of resin acids in tall oil rosin
Author(s) -
Holmbom B.,
Avela E.,
Pekkala S.
Publication year - 1974
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/bf02635015
Subject(s) - rosin , resin acid , abietic acid , tall oil , chemistry , chromatography , mass spectrometry , distillation , gas chromatography , gas chromatography–mass spectrometry , vacuum distillation , organic chemistry
Abstract The resin acid composition of Finnish tall oil rosin was investigated by gas chromatography and mass spectrometry employing open tubular capillary columns. On a column coated with 1,4‐butanediol succinate, 16 resin acids found in tall oil rosin samples were well resolved, and mass spectra could be recorded. All resin acids were confirmed to be of the pimaric and abietic types by gas chromatographymass spectrometry. Eight of the acids were not detected in the corresponding crude tall oils and evidently had been formed during the technical distillation process. The presence of 8,15‐pimaradien‐18‐oic and 8,15‐isopimaradien‐18‐oic acids in the rosin, but not in the crude tall oil, indicates that the pimaric type acids also undergo extensive isomerization during tall oil distillation. Additionally, three dihydroabietic acids and two acids with identical mass spectra, tentatively stereoisomers of 7,9(11)‐abietadien‐18‐oic acid, were formed during the distillation process.