One to two grams of pectin was ground to pass
80-mesh screen and placed into tared crucibles then
ignited in a furnace for 3-4 hours at 600°C. For the
determination of the alkalinity of the ash, ash was
dissolved in 25 mL of 0.1 N HCl, heated gently to
boiling and then cooled. It was then titrated with
0.1 N NaOH using phenolphthalein as an indicator