[A primary study on distribution and binding forms of arsenic in polluted crop seeds]

The distribution, binding form and processing removal of arsenic in rice and wheat seeds were studied. The result shows that the distribution of arsenic in seed parts was uneven, as concentration in rice seed was embryo > seed capsule > chaff > endosperm, and that in wheat seed was embryo > seed capsule > endosperm. Arsenic was mainly accumulated in endosperm, and mainly in the form of protein-binding. With the removal of chaff, coarse rice bran and fine rice bran in the processing, the content of arsenic decreased by 16.51%, 12.41% and 10.26%, respectively. Similarly, with the removal of coarse wheat bran and fine wheat bran, it decreased by 22.0% and 45.6%, respectively.