Abstract

TOVAR, Juan et al. Comparative study of the antioxidant effect of Ipomoea batata L. “purple sweet potato” in lyophilized and atomized powder. Rev. Soc. Quím. Perú [online]. 2021, vol.87, n.1, pp.50-56. ISSN 1810-634X.  http://dx.doi.org/10.37761/rsqp.v87i1.322.

The objective of the study was to determine the antioxidant activity in the lyophilized and atomized powder of Ipomoea batata L. by the DPPH and FRAP methods, in the variety from the Piura area known as “purple sweet potato”. Two drying methods were used, spray and lyophilization. To determine the antioxidant capacity, the DPPH and FRAP methods were used. The solubility test was carried out with water, ethanol and methanol. The results were the values of 23.23 µmol Trolox equivalents / g for DPPH and 20.18 µmol Trolox equivalents/ g for FRAP in the lyophilized sample and values of 5.24 µmol Trolox equivalents / g for DPPH and 4.96 µmol Trolox equivalents / g for FRAP in the atomized sample. In conclusion, the results show that the antioxidant capacity of the variety of Ipomoea Batatas L. (Purple Sweet Potato) presents a great difference in the results according to the drying method used, with freeze-dried drying demonstrating a higher antioxidant capacity.

Keywords : Ipomoea batata L.; purple sweet potato; antioxidant activity; DPPH; FRAP.

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