Abstract

IBIETA, Gabriela  and  PENARRIETA, J. Mauricio. Chemical characterization and quantification off tannins in the powder of Caesalpinia spinosa: Tara Boliviana. Rev. Bol. Quim [online]. 2021, vol.38, n.1, pp.26-35.  Epub Apr 30, 2021. ISSN 0250-5460.  https://doi.org/10.34098/2078-3949.38.1.3.

Tara powder is obtained by grinding the dry pods of the plant known as Tara(Caesalpinia spinosa), it is well known for its high content of tannins, which gives it great utility in the tanning industry, in the so-called vegetable tanning, its use has been widespread in recent years, because it is an environmentally friendly technique. In the world market, Peru is the largest exporter of Tara powder and there are many local studies on this product. particularly on its chemical properties. Bolivia could be considered a potential country in the production of Tara powder, the production in Bolivia is located in high altitude valleys (over 2000 masl) compared to other production sites worldwide. However, there are no studies on the influence of altitude on its physicochemical properties and the content of its tannins. In the present research, the chemical properties and the tannin content of the Bolivian Tara powder, from the department of Chuquisaca, localities of Icla, Tomina, Mojocoya Yacambé and Mojocoya Redención pampa were studied. The results suggested that Tara powder obtained from high altitude samples presents higher values of total tannins compared to those produced at a lower height above sea level, as a result of greater solar ultraviolet radiation in the production of tannins, more studies are necessary to establish such influence.

Keywords : Tara (Caesalpinia spinosa); Tannins; Condensed Tannins; Gallic acid; Leather Tanning.

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