TY - JOUR
T1 - Changes in the lipid composition of powdered infant formulas during long-term storage
AU - Rodríguez-Alcalá, Luis M.
AU - García-Martínez, María C.
AU - Cachón, Fátima
AU - Marmesat, Susana
AU - Alonso, Leocadio
AU - Márquez-Ruiz, Gloria
AU - Fontecha, Javier
PY - 2007/8/8
Y1 - 2007/8/8
N2 - Changes in the lipid composition of two standard infant formulas induced by 4 years of storage were determined. Lipids were thoroughly analyzed using different gas-liquid and liquid-liquid chromatographic techniques. Oleic acid and linoleic acid, which accounted for almost the total monounsaturated and polyunsaturated fatty acids, respectively, showed slight but significant decreases (P < 0.05) during the 4 years of storage (from 41.52 to 39.83% for oleic acid and from 17.35 to 15.99% for linoleic acid). Total trans fatty acid isomers showed low initial level (0.22% of total fatty acids), and such level remained unchanged during the storage period. Nonvolatile oxidation compounds including oxidized, dimeric, and polymeric triglycerides did not significantly increase during the storage period, although a significant loss of tocopherols was found in the surface oil fraction (10-15%). In general, the results obtained indicate that, although small losses of oleic and linolenic acid as well as tocopherols were found, the 4 year storage period did not lead to relevant changes in the lipid fraction of infant formulas.
AB - Changes in the lipid composition of two standard infant formulas induced by 4 years of storage were determined. Lipids were thoroughly analyzed using different gas-liquid and liquid-liquid chromatographic techniques. Oleic acid and linoleic acid, which accounted for almost the total monounsaturated and polyunsaturated fatty acids, respectively, showed slight but significant decreases (P < 0.05) during the 4 years of storage (from 41.52 to 39.83% for oleic acid and from 17.35 to 15.99% for linoleic acid). Total trans fatty acid isomers showed low initial level (0.22% of total fatty acids), and such level remained unchanged during the storage period. Nonvolatile oxidation compounds including oxidized, dimeric, and polymeric triglycerides did not significantly increase during the storage period, although a significant loss of tocopherols was found in the surface oil fraction (10-15%). In general, the results obtained indicate that, although small losses of oleic and linolenic acid as well as tocopherols were found, the 4 year storage period did not lead to relevant changes in the lipid fraction of infant formulas.
KW - Infant formula
KW - Oxidation compounds
KW - PUFA
KW - Storage
KW - Trans fatty acids
UR - http://www.scopus.com/inward/record.url?scp=34548037869&partnerID=8YFLogxK
U2 - 10.1021/jf0708591
DO - 10.1021/jf0708591
M3 - Article
C2 - 17630764
AN - SCOPUS:34548037869
SN - 0021-8561
VL - 55
SP - 6533
EP - 6538
JO - Journal of Agricultural and Food Chemistry
JF - Journal of Agricultural and Food Chemistry
IS - 16
ER -