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Iodine content in milk and milk whey during lactation
 JAKEŠOVÁ, Jitka
Milk is an important natural resource of iodine in human nutrition. The content of iodine in milk is an objective indicator of iodine saturation of cows. My work shows data about iodine content in milk and whey during lactation and other factors which affect the iodine contents. The experiment includes 12 milkers at the beginning of their lactation. This milkers are from breeding Haklovy Dvory, which is situated near České Budějovice. Samples of milk were collected with monitoring performance regularly once a month since August to November 2014. The iodine content was determined spectrometrically after alkaline burning of the sample. The average content of iodine in milk in August 2014 was 169.63 ? 70.39 g.l-1, in September 202.25 ? 65.08 g.l-1, at the beginning of November (substitute sampling for October) 183.91 ? 65, 31 g.l-1 and at the end of November 2014 216.56 ? 68.67 g.l-1. The average iodine content in whey in August could not be realized. The average iodine content in whey in September was 140.5 ? 55,3 g.l-1, at the beginning of November 131.5 ? 45,9 g.l-1 and at the end of November 2014 168.2 ? 77, 8 g.l-1. The iodine content in the milk whey corresponds with the range for the recommended daily ration of iodine.
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