Abstract

HUANCA LOPEZ, Susana; MOLLINEDO, Patricia  and  CHOQUE, Valerio. Caracterización del almidón de tubérculos andinos de Bolivia mediante DRX. Rev. Bol. Quim [online]. 2025, vol.42, n.1, pp.31-38. ISSN 0250-5460.  https://doi.org/10.53287/anah9521cp52p.

Characterization of starch from Andean tubers in Bolivia using XRD. The starch of Andean tubers from Bolivia, potato, tunta, chuño, oca, caya, papalisa, chuño de papalisa and isaño was characterized by XRD. The starch samples were assigned a type B crystallinity, which can be assigned to a starch with hydrated double helix packing in fixed and ordered positions of the hexagonal symmetry amylopectin, which, by crystallography tables, are assigned to the P6 space group. The estimated percentage of crystallinity was calculated using the ORIGIN 2021 program, where the samples: potato dehydrated with sunlight (P3), oca natural state (O1), papalisa dehydrated with sunlight (PL2) and black isaño (I2) have an estimated value of 41.9%, 55.1%, 52.5% and 48.5%, respectively. X-ray diffraction (XRD) analysis allows the classification of starch types based on their crystalline structure, which determines fundamental properties for their application in formulations and in the preparation of various mixtures.

Keywords : Starch; Characterization; Andean tubers; Bolivia; XRD.

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