Study on the extracted technology of pectin contents from Aloe skin

The Aloe (Aloe barbadensis Mill) was used as raw material, pectin was extracted by the acid hydrolysis alcohol precipitation method.The factors of the extraction temperature, extraction time, extraction pH and solid-liquid ratio were mainly investigated and analyzed.The pectin contents in Aloe skin and pulp were compared by pectin extraction experiments of Aloe skin and pulp.The extracted technology parameters was optimized by using single factor experiment and L9 (34) orthogonal test.The best technology conditions combination results of orthogonal test was extraction from Aloe skin at temperature of 80℃, extracting time of 100min, extract pH of 2.5, solid-liquid ratio of 1:15, pectin yield 0.84g/20g, rate 4.2%, while the Aloe pulp did not contain pectin.