Abstract: Guanxi honey pomelo peel as raw material,the optimum extracting conditions of pectin were investigated by single factor and orthogonal test design in this paper. The results showed that pH value of extraction had significant effect on the yield of pictin,and temperature of extraction,time of extraction had no significant effect. The results analyses showed that the optimum technological parameters were: extracting 90min at 90℃ with pH 1.5 value of extracting solution. The extraction yield of pectin was 19.10%. The extraction yield of pectin on this extraction conditions was high,and the qualities of pectin reached the national standards.

Key words:  , Guanxi honey pomelo peel； pectin； extraction； orthogonal test；