通过反气相色谱评估了6个不同地质分布区域的三个类型的瓷土样品（三个高岭土，三个依来石）。采用有限浓度法测定。

不同有机物探针得到样品的吸附等温曲线。并得到样品的吸附能表面分布和能量表面非均质性。实验证明在选取适合的有机探针时，该方法可以很好的区分粘土，伊利石和高岭土。甚至在同一粘土下面不同的地质条件，伊利石的非均质性高于高岭土。

The surface properties of six clay samples (three illites and three kaolinites formed under differentgeological conditions) were evaluated by inverse gas chromatography at finite concentration conditions.The determination of the adsorption isotherms for several organic probes, hexane, benzene, pyridine, and2-propanol, on these clays allows the estimation of their energetic surface heterogeneity through thedetermination of their adsorption energy distribution functions. It was then shown that, when the organicprobe is well chosen, this method allows distinguishing between the family of clay, illite or kaolinite, andeven, in a same family, between the different geological formation conditions. The illite samples are moreheterogeneous than the kaolinite samples