PHYSICO-CHEMICAL PROPERTIES OF Indigofera zollingeriana SEED OIL
J. O. ALAGBE *
Department of Animal Nutrition and Biochemistry, Sumitra Research Institute Gujarat, India.
M. O. ADEDEJI
Department of Animal Science, University of Abuja, Nigeria.
Z. HABIBA
Department of Animal Science, University of Abuja, Nigeria.
GLORIA NWOSU
Department of Animal Science, University of Abuja, Nigeria.
WYEDIA DABARA COMFORT
Department of Animal Science, University of Abuja, Nigeria.
*Author to whom correspondence should be addressed.
Abstract
The objective of this present study was to examine the physico-chemical properties of Indigofera zollingeriana seed oil. Physico-chemical parameters of oils are important in the determination of edibility and other industrial applications. All the laboratory analysis were carried out using standard procedures according to AOAC (2000). The acid value, peroxide value, iodine value, saponfication value, refractive index and free fatty acids of cold pressed Indigofera zollingeriana seed oil was found to be 17.11 mg NaOH/g, 23.04 meq/kg, 180.4 gI2/100g, 118.7 mg/KOH/g and 14.10 %. The refractive index (20oC) and specific gravity (25oC) was 2.01 and 1.02 respectively. The extracted oil was Indigo in colour at liquid state. It was concluded the oil has a high acid value, peroxide value and free fatty acid which favours the use of the oil for industrial use such as soap production and cosmetics.
Keywords: Indigofera zollingeriana, physico-chemical, edible, industrial applications, fatty acid