Proximate, amino acid and mineral composition of the seed of Cochlospermum tinctorium A. Rich.

Abstract

The proximate composition, amino acid profile and mineral constituents of the seed of Cochlospermum tinctorium A.Rich were evaluated. The proximate analysis revealed that the seeds contained 9.52 ± 0.07% moisture, 4.49 ± 0.04% ash, 15.92 ± 0.05 % crude protein, 33.27 ± 0.12% crude lipid, 6.01 ± 0.29% crude fiber and 40.22 ± 0.03% carbohydrates. The seeds also have high energy value (492.15 ± 0.15 Kcal/100g dry weight). Amino acid analysis showed the presence of seventeen amino acids. Among the essential amino acids, leucine, phenylalanine and valine were predominant while glutamic acid, alanine and arginine were predominant among the non-essential amino acids. Mineral composition indicated the following results; K(21.65 ± 0.03 mg/100g), Na(22.79 ± 0.12 mg/100g), Ca(28.09 ± 0.07 mg/100g), P(2.33 ± 0.02 mg/100g), Mg(18.50 ± 0.01 mg/100g), Cu(2.65 ± 0.03 mg/100g), Fe(12.53 ± 0.03 mg/100g), Mn(3.05 ± 0.02 mg/100g) and Zn(1.06 ± 0.12 mg/100g). The mineral nutrient density, which is the index of nutritional quality was high (>100%) for Copper, Iron and Manganese, but low (<100%) for Potassium, Sodium, Calcium, Phosphorus, Magnesium and Zinc. This confirms that the seeds of Cochlosperm tinctorium A.Rich are a rich source of Copper, Iron and Manganese.