Distribution and protein-binding forms of heavy metals in polluted wheat seed

The distribution and chemical forms of heavy metals in polluted wheat seed were studied. The results indicated that the distribution of heavy metals in wheat was very uneven. The heavy metals in wheat chiefly existed in the chemical forms of binding states and accumulated in the parts of high protei...

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Published inJournal of environmental science and health. Part A, Toxic/hazardous substances & environmental engineering Vol. 35; no. 10; pp. 1891 - 1899
Main Authors He, Meng-Chang, Yang, Ju-Rong, Cha, Yan
Format Journal Article
LanguageEnglish
Published Taylor & Francis Group 01.01.2000
Subjects
food processing
gel chromatography
Heavy metals
Triticum
wheat
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Summary:The distribution and chemical forms of heavy metals in polluted wheat seed were studied. The results indicated that the distribution of heavy metals in wheat was very uneven. The heavy metals in wheat chiefly existed in the chemical forms of binding states and accumulated in the parts of high protein. Thus the concentrations of heavy metals in the proteins were the highest. Separation of proteins by the Sephadex G-75 and subsequent analysis of Cd and Pb by atomic absorption spectroscopy revealed that they were mainly bound to proteins with molecular weights of 54.5 KD and 5.5 KD. During food processing, the concentrations of heavy metals in the edible parts decreased greatly.
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ISSN:1093-4529
1532-4117
DOI:10.1080/10934520009377084