Abstract
In the present study, selenium (Se) bioaccessibility was measured in rice and maize cultivated in seleniferous soil of India using in vitro gastric (GA) digestion and gastro-intestinal (GI) digestion methods. The concentration of bioaccessible Se was determined by instrumental neutron activation analysis (INAA). The total Se was observed to be about 58.0 mg kg−1 and 29.0 mg kg−1 in flours of rice and maize, respectively. Total Se content in maize flour sample after GA and GI digestions were approximately 9.5 mg kg−1 and 15.0 mg kg−1, respectively; and in case of rice samples, the levels were about 32.0 mg kg−1 and 38.0 mg kg−1, respectively. The results indicate that the bioaccessibility of GI digestion (51% in maize and 65% in rice) was higher compared to GA digestion (32% and 52% in maize and rice, respectively). In addition, the bioaccessible levels of Se were significantly more in case of rice compared to maize.
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