共查询到19条相似文献,搜索用时 46 毫秒
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采用制备型高速逆流色谱仪TBE-300A分离纯化北豆根药材中的活性生物碱类化合物。在实验过程中对溶剂系统和参数条件进行了系统的优化,获得较好的分离条件:溶剂系统为石油醚-乙酸乙酯-乙醇-水(1:2:1:2,V/V/V/V),上相(有机相)为固定相,下相(水相)为流动相,反相模式洗脱;进样浓度20mg/ml;进样体积20ml;流速2.0ml/min;转速850r/min。通过一步分离,获得了四种高纯度的生物碱类化合物,经HPLC、MS和NMR鉴定,分别为蝙蝠葛苏林碱(101.47mg,96.79/6),蝙蝠葛碱(155.68mg,95.6%),蝙蝠葛诺林碱((25.4mg,96.2%),蝙蝠葛新苛林碱(10.2mg,97.8%)。 相似文献
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应用高速逆流色谱法(High-Speed Counter-current Chromtography,HSCCC),从丹参的乙醇粗提物中分离纯化脂溶性成分.试验研究建立了以石油醚-乙酸乙酯-甲醇-水为溶剂体系,并优化了HSCCC的操作参数及操作方法,快速有效地分离得到5个丹参酮类化合物.经HPLC方法测定,其中丹参酮ⅡA、隐丹参酮、丹参酮Ⅰ、二氢丹参酮Ⅰ纯度均大于98%.该方法操作简捷,快速高效、费用低廉,重现性好,为中药丹参的质量控制所需要的高纯度化学时照品,提供了一种优良的制备分离方法. 相似文献
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高速逆流色谱是一种新型的、连续高效的液液分配色谱技术.它的固定相和流动相都是液体,没有不可逆吸附,具有样品无损失、无污染、高效、快速和大制备量分离等特点,此项技术已被广泛用于中药成分分离、保健食品、生物化学、生物化工、天然产物化学、有机合成、环境分析等领域.近年来,由于其与传统的分离纯化方法相比有明显的优点,高速逆流色谱技术被逐渐用于手性物质拆分,文章总结了溶剂体系的选择标准,以及目前在高速逆流色谱中进行手性拆分的研究进展. 相似文献
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高速逆流色谱属于一种新型分析分离技术,其主要是基于溶质差异化在两种不相溶溶液间进行差异化系数分配得以分离效果.在中药化学成分分离纯化中应用高速逆流色谱有很多优势,发展至今其已经成为一项中药化学成分分析分离的重要技术. 相似文献
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逆流色谱是一种不用固态支撑体或载体的液液分配色谱技术,其分离原理具有手性制备性分离的优势。以近年采用逆流色谱技术对手性化合物分离的应用进行了综述。 相似文献
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《分离科学与技术》2012,47(9):1289-1297
Recent increases in antibody titers have generated renewed interest in lower-cost continuous chromatographic processes for antibody purification. The objective of this study was to design, build, and test a continuous countercurrent tangential chromatography system in which the resin (in the form of a slurry) flows sequentially through a series of static mixers and hollow fiber membrane modules to accomplish the binding, washing, elution, stripping, and equilibration steps in continuous operation with true countercurrent staging. Experimental studies were performed for the purification of an IgG4 monoclonal antibody from a model feed containing bovine serum albumin and myoglobin using a protein A affinity resin. Batch uptake / desorption experiments were used in combination with critical flux filtration data to design the continuous countercurrent tangential chromatography system. The process was stable during continuous operation, providing the IgG4 at 94% yield with greater than 97% purity. The antibody productivity was more than 40 g protein per liter of resin per hour, which is significantly greater than can be obtained using conventional packed columns. The results clearly demonstrate the potential of using continuous countercurrent tangential chromatography for large-scale antibody purification. 相似文献
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利用高速逆流色谱分离邻苯二酚和对苯二酚 总被引:6,自引:0,他引:6
利用高速逆流色谱(HSCCC)成功分离了邻苯二酚和对苯二酚这一对同分异构体,以正己烷-乙酸乙酯-甲醇-水为溶剂系统,分离效果最好时的溶剂体积比为7:3:6:4,以上相为固定相,下相为流动相,流动相流速为0.5mL/min。 相似文献
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离线二维高速逆流色谱分离制备湖北海棠叶中的黄酮化合物 总被引:1,自引:0,他引:1
首次利用离线二维高速逆流色谱法从湖北海棠叶中分离制备3种黄酮化合物。第一次分离以正己烷-乙酸乙酯-甲醇-水(1:4:1:4,v/v)为溶剂系统,在2.5 h内分离得到纯度为96.5%的3-羟基根皮苷;第二次分离以正己烷-乙酸乙酯-甲醇-0.1mol/L Cu2+水溶液(1:4:1:4,v/v)为溶剂系统,在2.0 h内分离得到纯度98.1%的槲皮素和纯度98.9%的根皮苷。最终,成功从200 mg湖北海棠叶乙酸乙酯萃取部位中制备25.4mg的3-羟基根皮苷,8.5 mg的槲皮素,31.3 mg的根皮苷。利用HPLC、ESI-MS和1H NMR对分离物进行结构鉴定。 相似文献
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《分离科学与技术》2012,47(2):143-160
Abstract It is commonly believed that the optimum solvent ratio in countercurrent distribution and chromatography may be expressed as V = VU/VL = (KD1 KDπ ) ?½. Here VU and VL are the volumes of mobile and stationary phases. This expression, proposed by Bush and Densen and widely accepted, leads to optimum separations only under special conditions. Under most commonly-encountered situations in chromatographic and countercurrent systems, better separations may be achieved by reducing V to the lowest practicable level. Measures of separation effectiveness include resolution, extent of separation, total percent impurity, and quantity factor, the latter two of which are herein developed. Computer simulation is used for testing existing separation parameters and developing new ones on a rational and scientific basis. 相似文献