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Iodine concentration in Polish milk - variations due to season and region
Franciszek Brzóska1, Zbigniew Szybiński, Bogdan Sliwiński
1National Research Institute of Animal Production, Kraków. fbrzoska@izoo.krakow.pl
Introduction:
Iodine concentration was studied in Polish consumer milk.
Material And Methods:
The milk originated from 13 provincial cities and 65 dairy cooperatives located in Poland.
Results:
Milk iodine concentration in the winter season of 2007-2008 was 146.8 mg/L, with a standard deviation for the provinces of 27.9 mg/L and variation coefficient of 19.0% (n = 66 samples). Iodine concentration for provincial cities ranged from 76.3 to 192.0 mg/L. It was highest in the milk samples from the Lubelskie province (191.9 mg/L) and lowest in the milk samples from Podlasie (113.8 mg/L). In the summer season, milk iodine concentration averaged 100.4 mg/L, with a standard deviation of 38.9 ìg/L and variation coefficient of 38.8% (n = 27 samples).
Conclusions:
Iodine concentration for provincial cities ranged from 63.8 to 173.7 mg/L. Compared to the winter season, milk iodine concentration in the summer season was lower by an average of 25.2%, with a standard deviation of 4.3% (Kielce) to 52.2% (Wrocław).
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