了解和管理反相高性能液态色谱中基本溶液的峰值形状.
1College of Health, Science and Society, University of the West of England, Frenchay, Bristol BS16 1QY, UK. David.Mccalley@uwe.ac.uk.
概括
逆相液态染色学 (RPLC) 被广泛使用,但基本分析剂会导致峰值形状不佳. 本文讨论了提高峰值效率和减少RPLC分析中的不对称性的策略.
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:
- 反相液态色谱 (RPLC) 是用于各种样本分析的主要分离技术.
- 小分子,和蛋白质等基本溶液在RPLC中经常表现出不良的峰值形状 (宽度和尾部).
- 这种峰值不对称性阻碍了精确的分析物识别和量化.
研究的目的:
- 调查RPLC基本溶液低效率和峰值不对称的原因.
- 通过优化静止和移动阶段,讨论减少有害峰值影响的方法.
- 考虑柱子过载在峰值不对称性中的作用.
主要方法:
- 审查RPLC原则和共同的分析挑战.
- 讨论静态相化学物质及其对基本分析物的保留的影响.
- 移动相变换器及其对峰值形状的影响的分析.
- 考虑柱子负载对色谱性能的影响.
主要成果:
- 在RPLC中,峰值尾部和低效率往往与基于的静止相上的基本分析物和残留醇之间的相互作用有关.
- 选择合适的静止阶段 (例如,终端顶部或底部关闭) 可以显著改善峰值对称性.
- 移动相 pH,缓冲器选择和添加剂 (例如,离子配对剂) 对于控制分析物保留和峰值形状至关重要.
- 柱子过载可以加剧峰值不对称性,尽管其确切的贡献是有争议的.
结论:
- 优化静止和移动相选择对于减轻峰值不对称性和提高RPLC基本分析物的效率至关重要.
- 了解分析物化学,静态相性质和移动相条件之间的相互作用,可以提高染色学性能.
- 需要进一步的研究,以充分阐明导致峰值不对称的复杂机制,特别是关于柱子过载的复杂机制.
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