使用计算机产生极化电流具有纯度高、稳定性好和波形形状种类多等优点。研究了极化电流的频率、波形和相角对示波图的影响。对Ｃｄ２＋的测定的线性范围为２×１０－５～２×１０－４ｍｏｌ／Ｌ，相关系数为０．９９７。该方法有希望用于分析测试和动力学方面的研究。 The use of a computer to generate polarization current has the advantages of high purity, good stability and many kinds of waveform shapes. The effects of polarization current frequency, waveform and phase angle on oscillogram were studied. The linear range of Cd2 + was 2 × 10-5 ~ 2 × 10-4mol / L with a correlation coefficient of 0.997. This method is promising for analytical testing and kinetic studies.