Abstract
Pectin was separately extracted in warm water bath from sun-dried and crushed Prosopis africana seed gum, using 0.05 M solutions of HCl, H2SO4, CH3COOH, C6H8O7 and a 3:2 blend of (H2SO4: C6H8O7). The physicochemical properties of pectin extracted from the Prosopis africana seed gum shows the following: colour varied from beige-brown to wheat brown, equivalent weight (1,818.18 mg/mol to 25,000 mg/mol), methoxyl content (0.124 % to 1.705 %), moisture content (12 % to 38 %) and ash content (2 %) for all the solvent system used. Also, the comparative solvent performance shows that the H2SO4:C6H8O7 solvent blend was the most effective for pectin extraction followed by the solvent HCl and H2SO4, while C6H8O7 was the least effective. The comparative pectin yield of Prosopis africana seed gum using selected acid solvent ranged from 6.94 % to 15.28 %. Among the solvents under study, the H2SO4:C6H8O7 solvent blend gave the highest pectin yield (15.28 %) with beige-brown, low methoxyl pectin of high purity and could be used as a functional food ingredient domestically and industrially
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