婴儿配方奶粉保质期内营养素损失的研究

Analysis of nutrients loss in infant formula during shelf-life

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.