文档介绍：2012 年 11 月 北京联合大学学报 自然科学版 Nov． 2012
Technology Department of Food and Biology Engineering Fujian Zhangzhou 363000 China
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Abstract The total flavonoids from blood pummelo peel was carried out in the hot water extraction and the
Extraction yield was measured by coloration method with aluminum nitrate． The effects of parameters including
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ethanol concentration material-to-liquid ratio temperature and extraction time on extraction yield were
investigated by single factor test and orthogonal array design methods． And the notability difference was analyzed
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with the statistic method of range and variance． Results showed that the optimal conditions were as follows the
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temperature of extraction was 65℃ the ratio of material to liquid was 1 30 the concentration of ethanol was 55%
and the extraction time was 2. 5h． The extraction yield of the total flavonoids