Changes in the Lipid Composition of Powdered Infant Formulas during Long-Term Storage

详细信息    查看全文

• 作者：Luis M. Rodr&iacute ; guez-Alcalá ; Mar&iacute ; a C. Garc&iacute ; a-Mart&iacute ; nez ; Fá ; tima Cachó ; n ; Susana Marmesat ; Leocadio Alonso ; Gloria Má ; rquez-Ruiz ; Javier Fontecha
• 刊名：Journal of Agricultural and Food Chemistry
• 出版年：2007
• 出版时间：August 8, 2007
• 年：2007
• 卷：55
• 期：16
• 页码：6533 - 6538
• 全文大小：52K
• 年卷期：v.55,no.16(August 8, 2007)
• ISSN：1520-5118

文摘

Changes in the lipid composition of two standard infant formulas induced by 4 years of storage weredetermined. Lipids were thoroughly analyzed using different gas-liquid and liquid-liquid chromatographic techniques. Oleic acid and linoleic acid, which accounted for almost the total monounsaturatedand 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% forlinoleic acid). Total trans fatty acid isomers showed low initial level (0.22% of total fatty acids), andsuch level remained unchanged during the storage period. Nonvolatile oxidation compounds includingoxidized, 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 astocopherols were found, the 4 year storage period did not lead to relevant changes in the lipid fractionof infant formulas.