Supercritical fluid CO2 extraction of Acorus calamus L. (Arales: Araceae) and its contact toxicity to Sitophilus zeamais Motschusky (Coleoptera: Curculionidae)

文献类型： 外文期刊

第一作者： Yao, Yingjuan

作者： Yao, Yingjuan;Cai, Wanlun;Yang, Changju;Hua, Hongxia;Yao, Yingjuan

作者机构：

关键词： Acorus calamus;toxicity;Sitophilus zeamais;supercritical fluid CO2 extraction

期刊名称：NATURAL PRODUCT RESEARCH （ 影响因子：2.861； 五年影响因子：2.572 ）

ISSN： 1478-6419

年卷期： 2012 年 26 卷 16 期

页码：

收录情况： SCI

摘要： Contact toxicities of Acorus calamus L. (Arales: Araceae) extracts obtained from four published extraction methods: soakage, soxhlet, ultrasonic and supercritical fluid CO2 (SFE-CO2), were compared in this study. Under the given extraction conditions, SFE-CO2 extract exhibited the highest contact toxicity against S. zeamais of the four methods. With the SFE-CO2 method, extraction temperature, pressure, time and the amount of EtOH (the extraction solvent) were identified as having a significant effect on the extract. Orthogonal experiments showed that the optimal extraction parameters were: temperature -55 degrees C, pressure 35 MPa, time - 40 min and EtOH - 150 mL per 200 g of dry powder. Under these conditions, the yield was 4.12% and the LD50 of the extract against S. zeamais after 96 h of treatment was 27.26 mu g cm(-2). beta-asarone was the dominant component of the extract derived from the SFE-CO2 method, accounting for 24.39% of the extract. These results may contribute to the designing of large-scale production processes for obtaining A. calamus extract, which proves to be an effective alternative for the control of stored product insect pests.

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