共查询到18条相似文献,搜索用时 62 毫秒
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树脂吸附层析法分离喜树果中的喜果甙 总被引:3,自引:0,他引:3
自 1 96 6年 Wall等 [1] 首次从喜树植物中分离出喜树碱后 ,至今已有 2 0多种化学成分从中分离出来 ,包括喜树碱 (Camptothecine,CPT)、 1 0 -羟基喜树碱、 1 1 -羟基喜树碱、 1 0 -甲氧基喜树碱、喜树次碱、白桦脂酸及喜果甙 (Vincoside- lactam,VCS- LT)等 [2 ] .研究表明 ,喜树碱类化合物和喜果甙均具有抗癌活性 [3~ 5] .从喜树果中分离喜果甙对充分利用我国丰富的喜树资源具有重要意义 .目前文献报道的分离提取喜果甙方法主要是溶剂萃取和氧化铝柱层析法 [6] ,过程复杂 ,收率很低 .本文采用树脂吸附法对喜果甙进行分离纯化 ,再经… 相似文献
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TBP萃淋树脂微孔色谱柱分离富集钼的研究与应用 总被引:1,自引:0,他引:1
王玉学 《理化检验(化学分册)》1998,34(9):403-405
提出了用减压高效微孔色谱柱分离富集矿石中痕量钼,并对TBP苹淋树脂微孔层析柱的性能进行了较为详细的研究.试验发现,在零空床体积下,以3.0mol·L~(-1)盐酸溶液(在抗坏血酸存在下)为介质上柱,0.5mol·L~(-1)盐酸1.2ml洗脱,可以实现钢与大量铁、钨、钒、钛、锡、锆、铀等共存元素的分离.与常规柱相比较,减压微孔层析柱具有柱效高,洗脱体积小,分离速度快等优点,并能节省大量试剂.方法经标准样品验证,结果满意. 相似文献
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超高交联树脂对苯胺的吸附机理研究 总被引:11,自引:0,他引:11
在静态条件下,研究了水溶液中超高交联树脂AM-1和NJ-8及大孔吸附树脂Amberlite XAD-4吸附苯胺的热力学特性,测定了不同温度下的吸附等温线。结果表明,在稀溶液中3种树脂吸附苯胺都符合Langmuir和Freundlich模型,其中AM-1和NJ-8对苯胺的吸附是一个吸热过程;由于AM-1和NJ-8的微孔结构和表面存在酸性基团的吸附中心,对苯胺的吸附是物理吸附和化学吸附共同作用的结果。 相似文献
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《Analytical letters》2012,45(8):1581-1589
Abstract A rapid and efficient method for the separation and determination of free styrene in unsaturated polyester resin samples by gas chromatography was developed. A 10 cm pre-column connected to 1.2 m analytical column, both packed with 20 % carbowax 20M was used at 100°C with isobutylbenzene as an internal standard. Analysis time was two minutes with an accuracy of 0.3 %. 相似文献
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非多孔树脂的高效液相色谱填料及其对蛋白质的分离性能 总被引:1,自引:0,他引:1
合成并表征了粒度为7μm的基于聚(甲基丙烯酸甲酯/二乙烯苯)(PMMA/DVB)和在丙烯酸丁酯/二乙烯苯)(PBMA/DVB)的两种非多孔树脂。该类树脂可用作高效液相色谱填料的基质,也可直接用于色谱分离。PMMA/DVB树脂对于蛋白质的分离具有疏水怀相互作用色谱填料的性能,而PBMA/DVB树脂由于其强疏澡性则对于蛋白质的反相色谱是适宜的。基质树脂经NaOH溶液水解,就转化成表面含羧甲基的并具有相 相似文献
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Four neutral amino acids (Gly, Ala,.Val and Leu) were separated with ligand exchange resins. The separation capacity of the ligand exchange resins is compared with that of common ion exchange resins. The effects of eluent, column temperature, and central metal ions of the support on the separation are studied. The relationship between matrix structure of resins and their separation capacity is analysed. 相似文献
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Zinc isotope separations were studied by displacement chromatography using the chelating properties of malate, citrate and lactate exchange resin and EDTA as ligands. After each chromatographic operation, the heavier zinc isotopes were found to preferentially fractionated into the carboxylate complex solution phase. The separation coefficients (ε) for zinc isotope separation had the largest value and were obtained for the isotopic pairs 68Zn/64Zn (7.16 × 10?4) and 66Zn/64Zn (3.08 × 10?4), respectively, at 298 ± 1 K. The separation coefficient per unit mass differences (ε/ΔM) for the isotopic pair of 68Zn/64Zn was found to range around 1.55 × 10?4. 相似文献
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