The extracted pectin was precipitated by adding 200 mL 95% acetone to 100 mL of the extracted pectin with thorough stirring, left for 30 min to allow the pectin float on the surface. The gelatinous pectin flocculants was then skimmed off. The extracted pectin was purified by washing in 200 mL acetone and then pressed on nylon cloth to remove the residual HCL and universal salt.