Zawartość miedzi i cynku w surowcu i produktach ziemniaczanych różnego pochodzenia

Samples of potatoes from 6 various regions from Poland and 6 Mediterranean regions were studied for Cu and Zn content as received and after peeling and cooking. Some com. domestic products of their processing (pommes frites, chips with onion or paprika, potato flour) were also studied. The domestic raw potatoes showed higher Cu and Zn contents than the foreign ones. The peeling and cooking potatoes resulted in substantial decrease of the contents. The Zn/Cu ratio was 2.30-2.54 in the raw potatoes but only 1.31 in the potato flour.