Nutrients content and lipid characterization of seed pastes of four selected peanut (Arachis hypogaea) varieties from Ghana

Abstract

Guy Eshun, Emmanuel Adu Amankwah and John Barimah

The proximate nutrients, calorific value, mineral nutrients and lipid characteristics of the seed pastes of four (4) peanut (Arachis hypogaea) varieties namely: Sinkarzie, F-mix, JL 24 and Manipintar were investigated. Crude protein values ranged between 23.62% (±0.34) in Sinkarzie to 28.88% (±0.24) in JL 24. Crude fat ranged between 38.11% (±0.47) in JL 24 to 48.79% (±0.20) in Sinkarzie. Carbohydrate content ranged between 11.54% (±0.18) for Sinkarzie to 19.65% (±0.55) in JL 24. The energy content in kCal/100 g sample ranged between 537.06 in JL 24 to 581.54 in Manipintar. Calcium contents (mg/100 g) ranged between 23.14 (±0.49) in Manipintar to 128.25 (±2.90) in F-mix. At room temperature (25°C), all the oils from the four groundnut varieties were pale yellow coloured liquids with nutty odour. Saponification value (mg KOH/g oil) ranged from 144.70 (±0.63) in JL 24 to 208.97 (±0.58) in Sinkarzie. Iodine value (mg/100 g) ranged from 79.10 (±0.15) in Sinkarzie to 86.93 (±0.26) in F-mix. Percentage free fatty acids (% FFA) ranged from 8.09% (±0.20) in Manipintar to 14.21% (±0.10) in F-mix. The results indicate that while the groundnut seeds could be used in fighting malnutrition, the oils obtained from the seeds could also be used for domestic and industrial purposes.