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Previous studies have proven PCBs to be lipophillic, therefore residing in the fat tissues of mammals. This study uses butter samples from various countries across the globe to determine the distribution of PCBs and organochlorines and to verify higher concentrations of these POPs in colder environments. ... Cows ingest these POPs through grazing and from the air and eventually accumulate in their fat tissues. ... Overall, this study demonstrates higher levels of PCBs and organochlorines in the northern hemisphere, especially in larger countries with colder climates. Butter samples originating from areas closer to industrial activities exhibited higher concentrations of PCBs and organochlorine pesticides. Butter was determined to be an adequate matrix POP studies, however the researchers noted the importance of noting the influence of lactation cycles, seasons, and diet of the cows studied.
Approximate Word count = 543
Approximate Pages = 2.2
(250 words per page double spaced)
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