INVESTIGADORES
AÑON Maria Cristina
artículos
Título:
A kinetic study of phospholipids extraction by degumming process in sunflower seed oil
Autor/es:
PAN, L.G; CAMPANA, A; TOMÁS, M.C; AÑÓN, M.C
Revista:
JOURNAL OF THE AMERICAN OIL CHEMISTS SOCIETY (JAOCS)
Editorial:
SPRINGER
Referencias:
Año: 2000 vol. 77 p. 1273 - 1276
ISSN:
0003-021X
Resumen:
ABSTRACT: During the refining process of vegetable oils
(degumming), phospholipids are eliminated by thermal treatment
with water (hydratable phospholipids, HP) and other
degumming agents such as phosphoric acid, citric acid, or acid
mixtures (nonhydratable phospholipids, NHP). Samples of
pressed crude sunflower oils were degummed with water and
acids, and the corresponding pellets (gums) and supernatant oils
were obtained by centrifugation. During the water degumming
process, a decrease of more than 98% in the phosphatidylcholine
(PC) content was achieved in 5 min; phosphatidylethanolamine
(PE) was the most difficult compound to be removed.
Phosphatidylserine, phosphatidic acid, and phosphatidylinositol
(PI) presented an intermediate behavior. The
optimal contact time for quantitative extraction of the most important
HP (PC, PI, and PE) in crude sunflower oils was 35 min.
For acid treatments, a rapid elimination of the residual levels of
PC was registered (5 min); the optimal contact times for the
quantitative removal of the NHP were 35 min for phosphoric
acid and acid mixture, and 25 min for citric acid. Taking into
account that PE was the most difficult component to be removed,
its level could be used as a monitor to evaluate the efficiency
of the degumming processDuring the refining process of vegetable oils
(degumming), phospholipids are eliminated by thermal treatment
with water (hydratable phospholipids, HP) and other
degumming agents such as phosphoric acid, citric acid, or acid
mixtures (nonhydratable phospholipids, NHP). Samples of
pressed crude sunflower oils were degummed with water and
acids, and the corresponding pellets (gums) and supernatant oils
were obtained by centrifugation. During the water degumming
process, a decrease of more than 98% in the phosphatidylcholine
(PC) content was achieved in 5 min; phosphatidylethanolamine
(PE) was the most difficult compound to be removed.
Phosphatidylserine, phosphatidic acid, and phosphatidylinositol
(PI) presented an intermediate behavior. The
optimal contact time for quantitative extraction of the most important
HP (PC, PI, and PE) in crude sunflower oils was 35 min.
For acid treatments, a rapid elimination of the residual levels of
PC was registered (5 min); the optimal contact times for the
quantitative removal of the NHP were 35 min for phosphoric
acid and acid mixture, and 25 min for citric acid. Taking into
account that PE was the most difficult component to be removed,
its level could be used as a monitor to evaluate the efficiency
of the degumming process