Extracting Chlorogenic Acid from Sweet Potato Leaves and Stems and Determinating Its Content

Abstract

Abstract: This paper reported the extraction and the determination of chlorogenic acid in sweet potato leaves and stems by UV-spectrophotometry. The results showed the follows optimum extraction process: pH4, menstruum 50% ethanol or methanol and extracting time 1.0～1.5h. The contents of chlorogenic acid in the leaves and stems of sweet potato are highest in September and are respectively 4.49% and 1.26%. The contents in the tender stems are highest in July as 0.93%. It provides a theoretical basis for the utilization of sweet potato leaves and stems.

Key words: sweet potato leaves and stems, chlorogenic acid, UV-spectropHotometry

XIANG Chang-Guo, LI Wen-Fang, NIE Qin, LIU Qing-Bo, XIA Qin. Extracting Chlorogenic Acid from Sweet Potato Leaves and Stems and Determinating Its Content[J]. FOOD SCIENCE, 2007, 28(1): 126-130.

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Extracting Chlorogenic Acid from Sweet Potato Leaves and Stems and Determinating Its Content

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