摘要
根据样品分子在色谱柱分离过程中的输运特征，认为样品在系统中以跃迁的方式完成迁移，建立了色谱柱分离过程驰豫理论的基本模型。假设溶质在两相间平衡，用母函数方法研究非连续递推形式的驰豫理论输运动力学微分方程组，得到了描述组分在柱后浓度分布规律的基本流出曲线方程，并通过数值解方法模拟谱图对各输运参量与流出曲线特征的关系加以讨论。
According to the basic idea of relaxation theory in chemical dynamics and the moving character of the sample molecules in a chromatographic column, a new transfer model was established. It was supposed that solute molecules were in equilibrium between the stationary phase and mobile phase, and transfered in the mobile phase by a way of jumping. The generating function was used to investigate the non continuous dynamic transfer differential equations, and the basic profile of solute's distribution in the column is gained C N=2(N+1)C(0)v +tv +τ N+12 exp -v ++1/τt·I N+1 2v +/τ·t Based on this equation, the effect of transfer coefficient on the profile had been explained. The results show that relaxation time is an important factor which is related to the capacity factor and diffusion coefficient, and the number of jumping is a similar parameter to the plate number. The digital calculation method was used to study the influence of different physical parameters on the profile. The continuous form of the profile was also compared with the one from other methods.
出处
《色谱》
CAS
CSCD
北大核心
1999年第1期1-4,共4页
Chinese Journal of Chromatography
关键词
色谱
驰豫理论
输运
柱分离
模型
chromatography, relaxation theory, transfer
