若毛细管样品池探测区域内电场强度不均匀，则探测位置微小变动时，会导致电场强度的变化较大，进而造成zeta电位测量结果准确性降低。为了提升zeta电位测量结果的准确性和重复性，对不同尺寸的毛细管电极和不同结构的毛细管样品池进行了电场仿真。通过分析电极尺寸和毛细管样品池结构对电场强度均匀性的影响，得到了最优结构的毛细管样品池。

If the electric field intensity in the detection area of the capillary cell is non-uniform, a slight change in the detection position will result in a large change in the electric field intensity, which in turn will reduce the accuracy of the zeta potential measurement results. In order to improve the accuracy and repeatability of the zeta potential measurement results, an electric field simulation was carried out for capillary cells with different electrode sizes and cell structures. By analyzing the effect of electrode size and capillary cell structure on electric field intensity uniformity, the optimal capillary cell structure was obtained.