Abstract：
:Rice, a staple food for half the world's population, easily accumulates arsenic (As). Research on As distribution in rice protein and starch and its relationship with rice As bioaccessibility remains limited. This study investigated As distribution, chemical composition, As bioaccessibility and speciation in rice by continuous extraction and in vitro digestion. Of the total As, 87.5-94.5% was in rice protein and 5.0-9.8% in rice starch. The As amount in different protein fractions decreased as follows: glutelin > globulin > albumin > prolamin. As(V), As(III) and DMA in rice were more bioaccessible in the small intestinal phase than the gastric phase, and almost all As(V) dissolved in the small intestinal phase. Bioaccessible As in gastrointestinal digestive solution and As mass in protein fractions (albumin, globulin, and glutelin) were significantly positively correlated (p < 0.05). These results illuminate the bioaccessibility of As to humans consuming As-contaminated rice and avoid overassessment.
journal_name
Food Chemjournal_title
Food chemistryauthors
Wang P,Yin N,Cai X,Du H,Fu Y,Geng Z,Sultana S,Sun G,Cui Ydoi
10.1016/j.foodchem.2020.128969subject
Has Abstractpub_date
2021-06-01 00:00:00pages
128969eissn
0308-8146issn
1873-7072pii
S0308-8146(20)32853-3journal_volume
346pub_type
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