Acta Vet. Brno 2014, 83: 9-13

Iodine content in bulk tank milk samples in relation to dairy farm size

Lenka Vorlová1, Lucia Hodulová1, Ivana Borkovcová1, Hana Přidalová1, Romana Kostrhounová1, Marcela Klimešová-Vyletělová2, Květoslava Šustová3

1University of Veterinary and Pharmaceutical Sciences Brno, Faculty of Veterinary Hygiene and Ecology, Department of Milk Hygiene and Technology, Brno, Czech Republic
2Dairy Research Institute, Ltd., Prague, Czech Republic
3Mendel University, Faculty of Agronomy, Department of Food Technology, Brno, Czech Republic

Received March 5, 2014
Accepted July 23, 2014

The aim of this study was to compare the iodine content in raw milk from organic and conventional dairy farms of different sizes. Milk samples were collected between 2012 and 2013, and the iodine content was determined by a Sandell-Kolthoff reaction after dry alkaline digestion of the milk samples. Comparing the iodine content in raw milk samples from small sized dairy farms (116.76 ± 46.29 μg/l) and large sized dairy farms (173.70 ± 35.42 μg/l), a significant difference in iodine content was observed (P ≤ 0.05). The lowest values were found in small and medium dairy farms, 45.30 μg/l and 40.46 μg/l, respectively. High variability (112.92 ± 94.74 μg/l) in the iodine content was detected in raw milk from medium sized dairy farms. When considering milk samples from organic dairy farms (119.29 μg /l ± 40.37) vs. conventional dairy farms (136.55 μg/l ± 42.91), no significant difference was detected. These results indicate higher iodine content in milk from large dairy farms regardless of conventional or organic farming methods.


This study was supported by the Ministry of Agriculture in the Czech Republic, NAZV KUS QJ1230044.


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