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采用扑尔敏在水溶液中，于－０．４００ｖ（ｖｓ Ａｇ／ＡｇＣｌ）处出现一良好的二阶导数差示脉冲极谱峰，在２． ０～８．０×１０~(－４)ｍｏｌ／Ｌ范围内，药物浓度与其导数差示脉冲极谱峰幅值呈非常显著的线性关系（Ｐ＜０．０１）．检测限为２．０×１０~(－９)ｍｏｌ／Ｌ。平均回收率为９９．９０％，ＲＳＤ％＝０．５２（ｎ＝８）。
With chlorpheniramine in aqueous solution, a good second derivative differential polarographic peak appears at -0.400 v (vs Ag / AgCl) In the range of 0 ~ 8.0 × 10 ~ (-4) mol / L, there was a very significant linear relationship between the drug concentration and the amplitude of the derivative pulse polarographic peak (P <0.01). The detection limit is 2.0 × 10 ~ (-9) mol / L. The average recovery was 99.90%, RSD% = 0.52 (n = 8).