Abstract: Solanum tuberosum scrap was used as raw material in this experiment to extract pectin.The method of producting pectin that extracted by H2O and precipitated by Al2(SO4)3 was applied.The influence of pH value time of extraction,amount of abstraction, temperature and amount of Al2(SO4)3 on the production. The optimal combination of extraction conditions was:weight suitable dried solanum tuberosum scrap transfer to 15times water,heat with stirring at 90℃ for 60min then add 20% Al2(SO4)3 to the filterd pectin liquor to precipitate pectin.

Key words: Solanum tuberosum scrap Pectin Extracting conditions