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Optimizing separations in online comprehensive two‐dimensional liquid chromatography

机译:在线全面二维液相色谱中的分离优化

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摘要

Online comprehensive two‐dimensional liquid chromatography has become an attractive option for the analysis of complex nonvolatile samples found in various fields (e.g. environmental studies, food, life, and polymer sciences). Two‐dimensional liquid chromatography complements the highly popular hyphenated systems that combine liquid chromatography with mass spectrometry. Two‐dimensional liquid chromatography is also applied to the analysis of samples that are not compatible with mass spectrometry (e.g. high‐molecular‐weight polymers), providing important information on the distribution of the sample components along chemical dimensions (molecular weight, charge, lipophilicity, stereochemistry, etc.). Also, in comparison with conventional one‐dimensional liquid chromatography, two‐dimensional liquid chromatography provides a greater separation power (peak capacity). Because of the additional selectivity and higher peak capacity, the combination of two‐dimensional liquid chromatography with mass spectrometry allows for simpler mixtures of compounds to be introduced in the ion source at any given time, improving quantitative analysis by reducing matrix effects. In this review, we summarize the rationale and principles of two‐dimensional liquid chromatography experiments, describe advantages and disadvantages of combining different selectivities and discuss strategies to improve the quality of two‐dimensional liquid chromatography separations.
机译:在线全面二维液相色谱法已经成为分析各种领域(例如环境研究,食品,生命和高分子科学)中发现的复杂非挥发性样品的一种有吸引力的选择。二维液相色谱法是将液相色谱法与质谱法相结合的广受欢迎的连接系统的补充。二维液相色谱还可用于分析与质谱不兼容的样品(例如高分子量聚合物),提供有关样品成分沿化学尺寸(分子量,电荷,亲脂性)分布的重要信息,立体化学等)。而且,与传统的一维液相色谱法相比,二维液相色谱法具有更大的分离能力(峰容量)。由于具有更高的选择性和更高的峰容量,二维液相色谱与质谱的结合可在任何给定时间将更简单的化合物混合物引入离子源,从而通过减少基质效应来改善定量分析。在这篇综述中,我们总结了二维液相色谱实验的原理和原理,描述了组合不同选择性的优缺点,并讨论了提高二维液相色谱分离质量的策略。

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