...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Analytica chimica acta >A humic acid stationary phase for the high performance liquid chromatography separation of buckminsterfullerenes:Theoretical and practical aspects
【24h】

A humic acid stationary phase for the high performance liquid chromatography separation of buckminsterfullerenes:Theoretical and practical aspects

机译：腐殖酸固定相用于高效液相色谱分离buckminsterfullerenes：理论和实践方面

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The influence of the mobile phase composition and column temperature on the chromatographic separation of five buckminsterfullerenes (C60,C70,C76,C78,C84) on a stationary phase based on silica gel with chemically bonded humic acid (Bonded humic acid column (BHAC)) was studied.The retention behavior of the fullerenes was measured under isocratic conditions with different mobile phase compositions,ranging from 0.05-0.70 (v/v) of toluene in cyclohexane.The column temperature was analysed in the range 35-75 °C.The retention factors of the five fullerenes do not depend linearly on the toluene fraction but follow a quadratic relationship.The best chromatographic conditions for baseline separation of the five fullerenes were selected.The retention of the fullerenes on the HA stationary phase was strongly affected by temperature.Positive values of thermodynamic parameters (changes of enthalpy and entropy) were due to the abnormal solubility behaviour of fullerenes in toluene in the temperature range 35-75 °C.The information obtained in this work makes this BHAC very simple to prepare and low cost,useful for fullerene research applications.
机译：流动相组成和柱温对固定化硅胶上具有化学键合腐殖酸的五个buckminsterfullerenes（C60，C70，C76，C78，C84）色谱分离的影响（键合腐殖酸柱（BHAC））在不同流动相组成的等度条件下测量了富勒烯的保留行为，甲苯在环己烷中的浓度为0.05-0.70（v / v），柱温在35-75°C范围内进行了分析。五个富勒烯的保留因子并不线性地取决于甲苯分数，而是呈二次关系。选择五个富勒烯基线分离的最佳色谱条件。温度对HA固定相中富勒烯的保留有很大影响。热力学参数的正值（焓和熵的变化）是由于温度下富勒烯在甲苯中的异常溶解行为所致。温度范围为35-75°C。本工作中获得的信息使该BHAC的制备非常简单且成本低廉，可用于富勒烯研究应用。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号