Karaiskakis George, Gavril Dimitrios
Department of Chemistry, University of Patras, 26504 Patras, Greece.
J Chromatogr A. 2004 May 28;1037(1-2):147-89. doi: 10.1016/j.chroma.2004.01.015.
Gas chromatography (GC), apart from the qualitative and quantitative analysis of gaseous mixtures, offers many possibilities for physicochemical measurements, among which the most important is the determination of diffusion coefficients of gases in gases and liquids and on solids. The gas chromatographic techniques used for the measurement of diffusion coefficients, namely the methods based on the broadening of the chromatographic elution peaks, and those based on the perturbation of the carrier gas flow-rate, are reviewed from the GC viewpoint, considering their running though the history, the experimental arrangement and procedure, the appropriate mathematical analysis and the main results with brief discussions. The experimental data on diffusion coefficients, determined by the various gas chromatographic techniques, are compared with those quoted in the literature or estimated by the known empirical equations predicting diffusion coefficients. This comparison permits the calculation of the precision and accuracy of the techniques applied to the measurement of diffusion coefficients.
气相色谱法（GC）除了可用于气态混合物的定性和定量分析外，还为物理化学测量提供了许多可能性，其中最重要的是测定气体在气体、液体以及固体中的扩散系数。从气相色谱的角度对用于测量扩散系数的气相色谱技术进行了综述，这些技术包括基于色谱洗脱峰展宽的方法以及基于载气流速扰动的方法，同时考虑了它们的发展历程、实验装置和步骤、适当的数学分析以及主要结果，并进行了简要讨论。将通过各种气相色谱技术测定的扩散系数实验数据与文献中引用的数据或通过预测扩散系数的已知经验方程估算的数据进行了比较。这种比较有助于计算应用于扩散系数测量技术的精密度和准确度。
