.A flow chart for the extraction of pectin is depicted in Fig. 1. About
1 g of dried orange peel powder was weighed and placed into
a 250 ml Pyrex beaker and different amount distilled water
(10–20–30 ml) containing different pH values (1–1.5–2) was
added. The pH of the solvent was adjusted with the help of sulfuric
acid (0.05–0.016–0.005 mol/l). According to the experimental
design (Table 1), the extraction was performed under different