Pectin extractionwas also carried out using the optimum extraction conditions as mentioned above
for other peel fractions (WPD, IPD and WPF). As shown in Fig. 1, the pectin yield increased as the pH was decreased from 4 to 2. Commercially, pectin is extracted using hot dilute mineral acid at pH w2 (May, 1990). At hold temperature of 67.5 C, lower pH value and longer extraction time significantly increased the pectin yield.