Wykorzystanie badań mleka do oceny zaopatrzenia krów w selen w wybranych rejonach Polski

In four regions of Poland (6 voiwodships) differing by type of soils, methods of agricultural production and level of industralization 72 samples of milk were chosen from creamery. The content of selenium, determined by the method of McCarty et all., profoundly varied from 39.5 to 234.6 nmol.L_1. The lowest content of selenium was noted in the north-east and east part of Poland. It is suggested that the level of selenium depends mostly on type and quality of soil and industrial pollution.