01
Aug
Arsenic In Wheat Flour. The sensitivity of the method can be increased by a factor of 20 by precipitating AsV from 10 ml of digested sample using a weakly acid silver solution. Weimai possessed significantly lower p. Milling of wheat grain into bran and white flour fraction showed the concentration of As in the bran with a 3847-fold higher As concentration than in the white flour. Weimai and Wennong showed highest amounts of arsenic in flour than the other varieties at 50 or 100 mg kg soil treatment respectively.
Arsenic is a naturally-occurring element in rocks and soil. The amount of arsenic in wheat flour ranged from 3 µgkg to 400 µgkg. And are not related to organic farming practices. Arsenic contents of grain parts were dependent on variety and treatment level in polluted soils. The sensitivity of the method can be increased by a factor of 20 by precipitating AsV from 10 ml of digested sample using a weakly acid silver solution. The contribution of wheat to human intake of inorganic As is small for wheat crops grown in uncontaminated soils but becomes significant for those grown in soils with elevated As.
Milling of wheat grain into bran and white flour fraction showed the concentration of As in the bran with a 3847-fold higher As concentration than in the white flour.
In the latter case milling can be used to reduce the As concentration in the white flour. Two methods a phosphate buffer solution and 1 HNO 3 were used to extract As species from wholemeal bran and white flour of wheat with average extraction efficiencies of 65 and 88 respectively. The Ag3AsO4 precipitate is dissolved with 05 ml of 6 M ammonia and the resulting solution is. Before milling the wheat is soaked. When milled whole wheat grains generate bran and white flour fractions. One explanation could be water.