婴儿配方奶粉保质期内营养素损失的研究

摘要

通过分析常温下保质期内,婴儿配方粉中营养素损失情况,探究营养素损失率的变化.研究发现,脂溶性维生素中维生素A的损失率最大(达到25％).水溶性维生素中,维生素B12损失率最大(接近44％),VB2、叶酸损失率也在20％左右.而维生素C的损失率仅有9％.常量元素基本不损失,而微量元素中,铜的损失率最大(约9％).铁和锰的也有一定量的损失.DHA损失率很大,达到27％,而AA相对较少,只有8％左右.水分活度和酸价在保质期内都能控制在合理范围.通过对婴儿配方粉中营养素损失率的研究,为婴儿配方粉中营养素强化量设计,控制产品质量提供重要的理论依据.%Infant formula is an ideal substitute for breast milk,but many factors cause the loss of nutrients in infant formula during storage.The rate of nutrients loss in infant formula during shelf-life was investigated by analyzing it at 25 ℃.The results showed that fat-soluble vitamins A had a maximum loss rate by 25％.In water-soluble vitamins,the loss rate of vitamin B12 reached about 44％,and for vitamin B2 and folic acid,the rate was about 20％.Vitamin C only had a 9％ loss.No loss substantially existed in macroelements,whereas in trace elements,copper had a maximum the loss rate by approximately 9％.Iron and manganese had a lower amount of loss.DHA lost 27％,whereas AA had a relatively lower loss rate by 8％.Acid value and water activity can be controlled in a reasonable range during shelf-life.By analyzing loss rate of infant formula nutrients,the results would provide scientific basis for nutrients fortification in infant formula and controlling product quality.