根据ＺＬＣ法测定晶内扩散系数的基本原理，建立了测量误差与参数Ｌ、吸附质最低检测浓度及其精度的理论关系。结合环己烷在ＨＺＳＭ－５、Ｈβ和ΗＹ中扩散系数的测定结果，讨论了为满足ＺＬＣ的基本假设和提高测量精度在试验技术上应注意的问题，并指出了这一方法的应用范围 According to the principle of determining the intragranular diffusion coefficient by the ZLC method, the theoretical relationship between the measurement error and parameter L, the lowest detection concentration of adsorbate and its accuracy is established. Combining with the measurement results of cyclohexane diffusion coefficients in HZSM-5, Hβ and HY, some technical problems that should be paid attention to in order to meet the basic assumptions of ZLC and improve the measurement accuracy are discussed. The application scope of this method is also pointed out