Abstract

A model is suggested for calculating the shape of a thermochromatographic peak. The model is based on the adsorption–desorption kinetic equation for ultramicroscopic amounts of substances. An analytical solution of the kinetic equation was obtained by using a number of assumptions about the nature of the process, with these assumptions being valid in a certain range of experimental parameters. The resulting theoretical expressions describe different variants of thermochromatography: with fast introduction of the adsorbate into the column, at a permanent introduction of the adsorbate (frontal thermochromatography), and in exponential introduction. It was shown that the peak shape depends on various experimental parameters: enthalpy of adsorption, time of performing the thermochromatography, temperature gradient, etc. The results of theoretical calculations are compared with experimental data on separation of radionuclides and with the results of calculations by the Monte Carlo method with another existing model.

中文翻译：

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超微量物质热色谱峰形计算的动力学方法

摘要

建议使用一个模型来计算热色谱峰的形状。该模型基于超微量物质的吸附-解吸动力学方程。动力学方程的解析解是通过使用一些关于过程性质的假设获得的，这些假设在一定的实验参数范围内是有效的。由此产生的理论表达式描述了热色谱的不同变体：将吸附物快速引入色谱柱、永久引入吸附物（正面热色谱）和指数引入。结果表明，峰形取决于各种实验参数：吸附焓、进行热色谱的时间、温度梯度等。