以惰性物作为示踪物，采用扰动—响应方法在ＣＬ－ＴＢＰ溶剂浸渍树脂为填充剂的环状萃取色谱床中直接测定了示踪物停留时间分布曲线，求取了轴向扩散系数，并讨论了示踪物注入位置、冲洗液表观流速对轴向扩散系数的影响。研究结果表明，随着冲洗液表观流速的增加，轴向扩散系数亦增大。所建立的连续环状萃取色谱床中轴向扩散系数的关联式的计算相对偏差小于±５％。 Using inertia as tracer, the residence time distribution curve of tracer was directly determined by the perturbation-response method in CL-TBP solvent-impregnated resin packed bed, and the axial diffusion coefficient was obtained. The effects of tracer injection location, apparent flow rate of rinse solution on axial diffusion coefficient were discussed. The results show that the axial diffusion coefficient increases with the increase of the apparent flow rate of the rinse liquid. The calculated relative deviation of the axial diffusion coefficients in the continuous annular chromatography column was less than ± 5%.