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高效薄层色

 
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lin91957
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PostPosted: Mon 15:07, 28 Feb 2011    Post subject: 高效薄层色

高效薄层色谱法检测黄藤素中掺杂的黄连素
B22.571.942.762.740.572.1束柠出一5l_903.018422720.1】j8s批样品.结果以巴马汀盐酸盐计算,与薄层法测定结果比较,表4.化学测定法专属性差,不能鉴删井测出掺杂的黄连索袭4二种测定巴马汀方法结果批号化浊t、薄法召碡(j142功lO23州.l9兕34【50:.05443.6745759.2220.2.7精密度试验:分别精密吸取拥闷量的黄连索、巴马汀、药恨碱的对照品溶液,各点于3块薄层板上,按上述色谱条件洲矗:蜂面积再精密吸取0种相同龄的对照品涪壤舒别点于同的薄层板上。按上述色谱条件御!定嶂面移、.结果见表5袭5黄连素等的嗣板与异牺精密鹰“5样品f哪板雌面RsD抖板畔i}if#RsDA,0<AluL“j黄喜6、Jj2573.2日汀l(2s2.】i05428药档碱8941§§。12.d2.8稳定性考察;对展开后的黄连素等的斑点每隔0,5h扫描测定一次.结果在0,5~8h内结果稳定,萁相对标准偏差RSD分别为0.9、0,71、u,94%.(=3)。3讨论3.1由于黄违素与巴码汀硬药根戚的化学性质相似.很难甩-浪鹱歼系统将:者同时分离.在酸性展开制巾.药根碱与黄连素无法完全分开,在碱性展F荆中,巴马汀与黄连素:能完全分离.最后采用取向展开法,在高敛薄层板上.不经显色,即可定性、定量涮定,取得了满意的结果。3.2由予层析后的薄层板需要显色,扳子背景干净,薄层扫描背景噪音平滑,经比较.采用双波长扫描方式与单波长扫描方式,基线滑度一致,故采用单波长扫描方式即可满足分析要求。3.3黄连素、巴马汀与药撞!碱在各自测定的线性范围内,直线方程基本过原点.井由于双向展开点样方式的限制,用外标一点法定虽.取两块薄层板平行测定的平均值。从精密度测定结果看.此分析方法舁扳精密度与同板精密度相差夫。3.4黄藤素粗品lfJ有不溶物,样品用乙醇充分溶解霜.过滤.最罐液才能薄屡测定。3,s泼分析方法中的碱展开系统(1J.可作为没育掺杂黄连素的黄藤索柑品的含量测定西弦,分别测定巴码与药根碱的占量撑确、简便、快速3,6该方法所用色谱条件经反复宴验证明重现性好,检出斑点清晰酬蠼、直观、专属性强.为药厂及药检部门收购、鉴定黄藤素粗品提供了可靠的质量检验方法。
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