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地涌金莲挥

 
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lin91957
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PostPosted: Mon 8:47, 28 Feb 2011    Post subject: 地涌金莲挥

地涌金莲挥发性化学成分研究
neseTraditionalandHerbalDrugs2000年第3l卷第1期·19‘2.2标准曲线的绘制:精密称取8O℃干燥至恒重的天麻素5mg,置25mL量瓶中,加甲醇溶解并稀释至刻度,摇匀。从中吸取0.5,1.0,1.5,2.0,2.5mL分别稀释至10mL。吸取上述溶液,分别进样10L,以进样量X为横坐标,峰面积y为纵坐标作图,得回归方程为Y=2822785X一8040,r一0.9999。进样量在0.1~O.5,ug范围内线性关系良好。2.3样品测定:取本品内容物O.5g,精密称定,置具塞三角瓶中,精密加甲醇2OmL,称重,超声处理30min(提取功率大于250W,频率大于40kHz),放冷,甩甲醇补足重量,滤过,弃去初滤液5mL,精密量取续滤液1mL置水浴上蒸干,残渣甩少量水溶解,加在中性氧化铝柱(100~200目,5g,内径1.2cIn,干法装柱)上,用70甲醇30mL洗脱。收集洗脱液,置水浴上燕干,残渣加甲醇溶解并定容于10mL量瓶中,摇匀吸取上述溶液进样分析,结果见表1,图l。寰1天麻蠢的含量嗣定结果(=3)供崔品天席童对一品空白田1三通风沮康肢囊BIPLC色谮田2.4重现性实验:依样品测定步骤对同一批号样品重复分析5次,测得每粒含量(rag)分别为3.48,3.46.3.51,3.52,3.49,RSD为0.80,表明重现性较好。2.5精密度试验:精密吸取对照品溶液1OL,连续进样6次,RSD为0.88,表明仪器精密度良好。2.6加样回收率实验:精密称取巳知含量的三通风湿康胶囊内容物约0.25g,加人天麻素对照品3.5mg,按样品测定项下步骤进行分析。其结果平均回收率为99.29,RSD为0.33。2.7稳定性实验:取三通风湿康胶囊,依样品测定项步骤制备样品,每隔2h进行分析,共7次。其RSD为0.88%。表明样品12h内稳定。3讨论3.1检测波长的选择:经对天麻素的紫外吸收光谱的测定,其吸收峰波长为221nm和26813.13o_。由于在268D.m处,样品峰很多,且很难分离,又由于在221I3.111处的吸收度显著强于268nln处,故选择221rlln为测定波长。3.2提取溶媒:根据天麻素和其他成分的理化性质及制备工艺条件,选择了7o乙醇、9o乙醇、无水乙醇、甲醇、甲醇一异丙醇(1:1)为提取溶媒,均超声处理30min,制备供试液,经测定比较.以甲醇为提取溶媒为佳。3.3除杂质方法:比较了硅胶柱和中性氧化铝柱,结果表明上中性氧化铝柱除杂质好,回收率高。3.4分离条件的比较:经过甲醇一水不同比例(3:97,5}95,6:94,7:93)、乙腈一水不同比例(3:97,5l95,6:94,7l93)、乙腈一水一磷酸(3:97:0.2)的比较,确定为乙腈一水一磷酸(3:97:0.2),流速1mL/rain,柱温为4O℃。●考文俄1马公强,等.药物分析杂志,1981,1(3)1652黄玉仙t等.中成药研究,1988,11(4):583程式之,等.药物分析杂志,1984,4(63444程式之,等.贵州药讯,1985,(1):1(1999—03一l8牧稿)(上接第l4页)1993l8313宠春#·云南省特种曲植物产生与市墙发展研讨台论文集.昆明云南科技出版杜,1995:1724HetlorSR.EPA/N1HMassSpectralDantaBase.voLL一4andSupment1WashingtonUS=Gover0.1~lentPrintingOffice1978and1988(1999—03—26收稿)
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