温度及光照对婴幼儿配方乳粉中VA、VD稳定性的影响

为研究不同温度条件下婴幼儿配方乳粉中VA和VD的稳定性,分别考察其在25、40、60 ℃及80 ℃储藏条件下乳粉中的含量变化;通过采用透光和避光2种方式储存的乳粉进行光照试验,研究了光照对乳粉中VA和VD稳定性的影响。结果表明,25 ℃储藏条件下,乳粉中VA和VD含量均无明显变化;40、60 ℃和80 ℃条件下,VA含量有不同程度的降解,而VD无明显变化。光照条件下,乳粉中VA和VD均发生明显降解,其中VA含量在光照1 h后损失达50%,VD含量在光照12 h后损失了将近50%。

Effect of Temperature and Light on Stability of V and V in Infant Formula Milk Powder

In order to investigate the stability of VA and VD in infant formula milk powder at different temperatures,the changes of the content of VA and VD in the milk powder stored at 25 ℃,40 ℃,60 ℃ and 80 ℃ were studied respectively.The effects of light on the stability of VA and VD in infant formula milk powder were studied under the condition of exposure and keep out of sun-light.The results showed that the content of VA and VD in milk powder did not change significantly at 25 ℃.The contents of VA were degraded to diffferent degrees at 40 ℃,60 ℃ and 80 ℃,while VD did not change significantly.Under the light condition,VA and VD in milk powder were degraded obviously.The content of VA lost 50% after 1 hour of exposure,and the content of VD lost nearly 50% after 12 hours of exposure.