水和蛋白溶剂对基于多糖的柱子效率的影响
1Department of Anlytical Chemistry, Paraza Pharma Inc., Saint-Laurent, Canada.
Journal of separation science
|October 27, 2023
概括
在奇拉色谱柱中用水和甲醇和乙醇等基溶剂取代乙二,可能会对质量转移和柱效率产生负面影响. 乙和其水混合物是最佳性能的首选,特别是在更高的流速下.
科学领域:
- 分析化学 分析化学
- 染色体学 染色体学 是一种染色学.
背景情况:
- 基于多糖的柱子在性染色学中被广泛使用.
- 移动相组合显著影响色谱性能,包括反体分辨率和质量转移.
- 乙二是逆相HPLC移动相中常见的有机修饰剂.
研究的目的:
- 为了评估在移动阶段用水和性溶剂 (甲醇,乙醇) 取代乙二对基于多糖的性柱效率的影响.
- 研究不同含水量与性溶剂相结合对质量转移和柱子板高度的影响.
- 为了确定性分离的最佳移动相条件,特别是在更高的流速下.
主要方法:
- 使用基于多糖的柱子进行染色学分析.
- 系统地改变移动相组合,用水,甲醇和乙醇取代乙二.
- 通过测量柱子板高度和检查范迪默特图,分析柱子效率.
- 在不同的流速下评估性能,重点关注4.6毫米柱的1毫升/分钟以上的条件.
主要成果:
- 增加的水含量通常会改善反体分辨率,但会对质量转移产生不利影响.
- 水与甲醇和乙醇的组合对柱子板高度产生了负面影响.
- 与甲醇相比,乙醇对质量转移具有更明显的不良影响.
- 范迪默特图表经常缺乏在测试的流速范围内的最佳最小点.
- 基于酸的移动相在减轻这些不良影响方面表现出卓越的性能.
结论:
- 水和性溶剂 (甲醇,乙醇) 在基于多糖的性染色学中可以对质量转移和柱效率产生负面影响.
- 建议使用乙和其水性混合物作为移动相,以保持最佳的柱子性能,特别是在流量超过1mL/分钟的情况下.
- 仔细考虑移动相组合对于实现高效的奇拉分离和避免低于最佳的色谱条件至关重要.
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