铁碘强化营养盐的稳定性研究

Studies on Stability of Iron Iodine Fortified Salt

对使用乙二胺四乙酸铁钠(NaFeEDTA)、乳酸亚铁、硫酸亚铁作为强化剂的铁碘强化营养盐在不同贮藏条件下铁营养强化剂和碘的含量变化情况进行了考察。在敞口避光、密封避光及敞口日照3种条件下对上述3种添加不同铁强化剂铁碘强化营养盐进行了90 d的贮藏,在贮藏过程中对其中的铁含量和碘含量进行了检测。结果显示:添加NaFeEDTA营养盐中NaFeEDTA和碘的含量稳定,而添加乳酸亚铁、硫酸亚铁作为强化剂的营养盐中大约有30%～40%的二价铁离子会被氧化,还会造成其中碘的大量损失。因此从稳定性来看,NaFeEDTA适于在铁碘营养盐中的添加。

The stability of iron iodine fortified salt with various iron fortifier （ferrous lactate, ferrous sulfate and NaFeEDTA） has been investigated under various conditions of storage. The iron iodine fortified salt had been stored in different conditions（ unsealed and light exposure, unsealed avoid light, sealed avoid light）, the iron fortifier and iodine content were determined during the storage. High NaFeEDTA and iodine retention values were obtained during the 90 days＇ study. NaFeEDTA and iodine was more stable in NaFeEDTA fortified salt, while 30% -40% of the ferrous iron were oxidized in fortified ferrous lactate and ferrous sulfate salt. Therefore NaFeEDTA was more appropriate iron fortifier in iron iodine fortified salt.