Observations on metal distribution in wheat flour fractionation
1995
Polacekova, O. | Korenovska, M. | Zauskova, P. (Vyskumny Ustav Potravinarsky, Bratislava (Slovakia))
Lead and cadmium distribution in wheat flour fractionated into a protein fraction (gluten) and a non-protein fraction (starch) was observed. It was discovered that ca 35 percent of lead and 80 percent of cadmium bound to the gluten and ca 65 percent of lead and 18 percent of cadmium passed to the starch. Metal distribution into the starch and gluten was then observed after man-made contamination of dough by lead, cadmium and mercury. From the added amount, 58 percent of lead, 70 percent of cadmium and 75 percent of mercury passed to the gluten, and 32 percent of lead, 14 percent of cadmium and 11 percent of mercury passed to the starch. Metal content in common products was determined: in wheat flours the content of Pb, Cd, and Hg respectively, in mg per kg, was: 0.025, 0.02, and 0.002; for wheat starches the figures were: 0.08, 0.004, and 0.01; and for wheat glutens, 0.1, 0.1, and 0.015
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