NONEQUILIBRIUM KINETICS AND CHROMATOGRAPHY
NONEQUILIBRIUM KINETICS AND CHROMATOGRAPHY
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非平衡动力学和色谱
DOI：
10.1063/1.1730636
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发表时间：
1959
影响因子：
4.4
通讯作者：
J. Giddings
中科院分区：
文献类型：
--
作者：
J. Giddings
本文试图解决色谱中决定组分区结构的复杂动力学过程。这个问题是通过假设各个步骤都在接近平衡的情况下进行来解决的。为了便于分析，作了一种近似，其中浓度的每个导数都用平衡浓度的导数代替。后一种衍生物是根据浓度曲线来评估的。这产生了一组线性代数方程，从中可以找到每个物种的平衡偏离项e。然后得到区域的扩散作为各种e的函数。与只处理最简单的动力学格式的严格理论相比，这种方法的简洁性使人们能够获得复杂动力学的区域扩散项。然而，对于一个简单的动力学例子，在大时间的限制下，用严格的方法得到的结果是相同的。的有效性。
An effort is made here to deal with the complex kinetic processes which determine the structure of component zones in chromatography. The problem is approached by assuming that the various steps are proceding near equilibrium. In order to facilitate the analysis an approximation is made in which each derivative of a concentration is replaced by the derivative of the equilibrium concentration. The latter derivatives are evaluated in terms of the concentration profile. This yields a set of linear algebraic equations from which an equilibrium departure term, e, can be found for each species. The diffusion of the zone is then obtained as a function of the various e's.The simplicity introduced by this method allows one to obtain the zone diffusion term for complex kinetics in contrast to the rigorous theories where only the simplest kinetic schemes have been treated. The results for a simple kinetic example are the same, however, as obtained in the limit of large times by the rigorous methods. The validity of ...