Retention in reversed-phase liquid chromatography: solvatochromic investigation of homologous alcohol-water binary mobile phases.

Retention in reversed-phase liquid chromatography: solvatochromic investigation of homologous alcohol-water binary mobile phases.
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反相液相色谱中的保留:同源醇-水二元流动相的溶剂化显色研究。

DOI:
10.1016/s0021-9673(01)82057-4
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发表时间:
1988
期刊:
Journal of chromatography
影响因子:
--
通讯作者:
Dorsey,JG
Dorsey,JG
中科院分区:
--
文献类型:
--
作者:
Michels,JJ;Dorsey,JG

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本文用ET(30)溶剂化显色溶剂极性标度对反相液相色谱(RPLC)中的保留机理作了进一步的探讨。在水有机移动的相中,使用一系列的正构醇作为有机改性剂,测定了各种溶质的保留行为。结果表明,固定相的溶剂化程度发生系统的变化相对于有机改性剂的大小。用甲醇、乙醇和乙腈(但不包括正丙醇)作改性剂,对不同移动的流动相的logk′-ET(30)曲线进行线性外推,可近似得到纯水的ET(30)值。这进一步证明了ET(30)溶质保留模型是研究反相液相色谱中溶质保留机理的有效工具。从ET(30)图中推断出的在水中的保留值logk′w应被证明是使用RPLC估算溶质亲脂性比有机改性剂百分比模型更可靠的方法。
The mechanism of retention in reversed-phase liquid chromatography (RPLC) has been further investigated using theET(30) solvatochromic solvent polarity scale. The retention behavior of a variety of solutes was measured using a homologous series of normal alcohols as the organic modifiers in hydroorganic mobile phases. The results imply that a systematic change in the extent of solvation of the stationary phase occurs with respect to the size of the organic modifier. It was also found that a linear extrapolation of the logk′versusET(30) plots for different mobile phases using methanol, ethanol and acetonitrile (but notn-propanol) as modifiers, intersected at approximately theET(30) value of pure water. This intersection is further evidence that theET(30) model of solute retention is a useful tool with which to study the mechanism of retention in RPLC. The extrapolated retention value in water, logk′w, from theET(30) plots should then prove to be a more reliable means of estimating solute lipophilicity using RPLC than the percent organic modifier model.
用于估计辛醇/水分配系数的准确、宽范围、自动化、高效液相色谱方法 I:色谱条件和程序变量对方法的准确性和重现性的影响。
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