Abstract

TRULLS, H. E. et al. Bioaccessibility of major minerals and trace elements in different varieties of cooked rice, from the Argentina. Rev. vet. [online]. 2021, vol.32, n.1, pp.19-24. ISSN 1669-6840.  http://dx.doi.org/10.30972/vet.3215628.

19.

The objective of this work was to evalúate the total and bioaccessible concentration of elemental nutrients in rice varieties, from the provinces of Corrientes and Entre Ríos. The samples of cooked white ríce, fine long and fortuna or double Carolina varieties, were processed by standardized methods, like moisture, total proteins by Kjeldhal, fiberby a gravimetricenzymatic method. The macroelements calcium and magnesium were evaluated by complexometry, phosphorus by UV-visible spectrophotometry, and the micro- elements iron, copper and zinc were performed by atomic absorption spectrophotometry. The bioaccessible fraction was determined by an in vitro dialysis method, using an enzyme complex and successive incubations reproducing the digestión process under physiological conditions. The results of total calcium ranged between 50 mg/lOOg of the double Carolina variety from Corrientes and 87 mg/lOOg of the fine long from the same province, the dialyz- able calcium was between 15 and 16%, the total phosphorus ranged between 39.4 mg/lOOg in fine long and 56.2 mg/lOOg in double Carolina, both from Entre Ríos, and the dialysable fraction varied between 15 and 20%, the total magnesium content fluctuated between 30.0 mg/lOOg and 51.0 mg/lOOg and the dialyzable between 22 and 31%. Regarding iron, it had total concentrations of 6 mg/kg in fine long rice, with 60% of dialyzable fraction and 12 mg/ kg in double caroline, but with 35% of dialyzability. Total copper yielded valúes between 3.45 mg/kg and 5.70 mg/kg with 6 to 30% dialysed fraction. The total zinc content varied between 10.21 mg/kg and 11.48 mg/kg, with a low bioaccessible fraction of 3%. It is concluded that the total and bioaccessible contents of these nutrients is initial information to promove a fortification program in rice, which is the most important crop in the region.

Keywords : rice; bioaccessibility; macrominerals; trace elements..

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