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ON THE SELECTIVITY OF ADSORPTION CHROMATOGRAPHY

机译：吸附色谱的选择性

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In this paper, the shape of chromatograms obtained by elution of copolymers with a mixture of solvent-nonsolvent of variable composition has been studied from a theoretical point of view. It is assumed that the thermodynamic quality of the mixture at which the copolymer is eluted depends only on its composition and not on its mass and structure. If one characterizes the polydispersity in composition, assuming that each constituent obeys a molar mass distribution of the Zimm-Schulz type, one can draw the following curves: concentration of the copolymer versus eluant composition. They depend on three parameters, including composition of the copolymer and the polydispersity of each constituent. The most striking result is that the shape of the chromatogram changes dramatically when one increases the polydispersity of either constituents. For low polydispersities, one obtains a classical peak. For large polydispersities, the chromatogram has a minimum for the intermediate values of composition and presents peaks in the vicinity of the pure homopolymers. This can be explained easily by a qualitative argument. (C) 1996 John Wiley & Sons, Inc. [References: 7]
机译：在本文中，已经从理论的角度研究了通过共聚物与不同组成的溶剂-非溶剂混合物洗脱得到的色谱图的形状。假定洗脱共聚物的混合物的热力学性质仅取决于其组成，而不取决于其质量和结构。如果以混合物中的多分散性为特征，假设每种成分均服从Zimm-Schulz型的摩尔质量分布，则可以绘制以下曲线：共聚物的浓度与洗脱液的组成。它们取决于三个参数，包括共聚物的组成和每种成分的多分散性。最显着的结果是，当色谱图的形状增加任一组分的多分散性时，色谱图的形状就会发生巨大变化。对于低多分散性，可获得一个经典峰。对于较大的多分散度，色谱图的组成中间值最小，并且在纯均聚物附近出现峰。用定性的论点可以很容易地解释这一点。 （C）1996 John Wiley＆Sons，Inc. [参考：7]

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