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Characterization of triacylglycerols in Madeira laurel oil by HPLC-atmospheric pressure chemical ionization-MS
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Orientador(es)
Resumo(s)
Madeira laurel oil was fractionated by liquid ex traction combined with TLC, and TAGs were analyzed by HPLC
coupled with atmospheric pressure chemical ionization-MS
(APCI-MS). Eluted molecular species compositions of the eluted
TAG in the complex natural mixture were determined by GC
identification of FAME and by LC-atmospheric pressure chemi cal ionization (APCI)-MS analysis of the lipid. The APCI-MS
spectra of most TAG exhibited [M + H]+ and [M − RCOO]+
ions, which defined the M.W. and the molecular association of
fatty acyl residues, respectively. Despite the relatively high de gree of saturation, with a saturated/unsaturated ratio of 0.70, no
totally saturated TAG nor mixed asymmetric TAG with two sat urated FA (SSM or SSU, where S is saturated, M is monounsatu rated, and U is unsaturated) were found. This type of molecular
structure provides a possible explanation for the relatively low
m.p. (12–15°C) and also the high oxidative resistance observed.
Descrição
Palavras-chave
APCI-MS HPLC Madeira laurel oil Triacylglycerols . Faculdade de Ciências Exatas e da Engenharia
Contexto Educativo
Citação
Castilho, P. C., do Céu Costa, M., Rodrigues, A., Branco, P. C., & Costa, M. (2004). Characterization of triacylglycerols in Madeira laurel oil by HPLC-atmospheric pressure chemical ionization-MS. Journal of the American Oil Chemists' Society, 81(10), 913-919.
Editora
Wiley