PreeKem Scientific Instruments Co.,Ltd. applications

Iodine, a kind of common microelement, is usually added in infant milk power at microgram level, but it plays important role in infant growth and development. It impedes the growth of infant with insufficient or redundant dosage, for example it causes mental deficiency with less iodine however, it also causes thyroid problem with excess intake. Hence， there is strict limit for the addition of iodine in milk powder. The China nation standard GB14880-94 regulated that iodine or iodate is allowed for 250-680μg/kg in baby food and 30-150μg in 100g milk or rice powder. Iodine exists in the form of Iodine 127 isotope and it’s detectable with in measurable range of spectrum. However it’s added in iodate form in nourishment and binding with protein or other ingredients. Once the sample decomposes, iodine is very volatile and gets lost. This adds up difficulty of pretreatment of iodine-containing sample.