Assessment of arsenic distribution, bioaccessibility and speciation in rice utilizing continuous extraction and in vitro digestion.

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 Chem

journal_title

Food chemistry

authors

Wang P,Yin N,Cai X,Du H,Fu Y,Geng Z,Sultana S,Sun G,Cui Y

doi

10.1016/j.foodchem.2020.128969

subject

Has Abstract

pub_date

2021-06-01 00:00:00

pages

128969

eissn

0308-8146

issn

1873-7072

pii

S0308-8146(20)32853-3

journal_volume

346

pub_type

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