Caracterização físico-químicas do óleo de duas cultivares de mamona.

Abstract

In this work, the physic-chemical characteristics of oil of two castor oil varieties (Brs-149 Nordestina and Brs-188 Paraguaçu) had been determined. Analyses of humidity, acid value, peroxide index, soapy index and iodine index had been gotten, in agreement methodology of the INSTITUTE ADOLPH LUTZ (1985). The moisture content found in the rude oil of the two varieties have been minor that 0,55 w.b. The acidity was 1,6 mg KOH/g for the BRS-149 oil and 0,25 mgKOH/g for the BRS-188 oil, therefore, they are classified as type 1 and 3, respectively. On the basis of the iodine index results, the oils can be classified as half-dry oils. The soapy index, the peroxide index and the refractive index are in compliance with literature