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采用线性循环溶出伏安法和差分脉冲溶出伏安法对磺胺嘧啶在电活化玻碳电极上的电化学行为进行了研究。玻碳电极在PBS溶液中(pH 7.0),用恒电位法在1.7 V阳极氧化400 s,在B-R缓冲溶液中,磺胺嘧啶在1.02V(vs.Ag/AgCl)处有一良好的氧化峰,在0.02～0.25 V/s范围内,其氧化峰电流与扫描速率呈良好线性关系,表明电极过程为受吸附控制的不可逆过程。差分脉冲溶出伏安法的氧化峰电流(Ipa)与磺胺嘧啶浓度1×10-6～1×10-4mol/L范围内呈良好的线性关系(r=0.9977),检出限为8.7×10-7mol/L(S/N=3)。方法已用于分析磺胺嘧啶片剂的分析。
The electrochemical behavior of sulfadiazine on activated glassy carbon electrode was studied by linear cyclic stripping voltammetry and differential pulse stripping voltammetry. The glassy carbon electrode was anodized at 1.7 V for 400 s in a PBS solution (pH 7.0), and had a good oxidation peak at 1.02 V (vs. Ag / AgCl) in a BR buffer solution. 0.02 ~ 0.25 V / s range, the oxidation peak current and the scan rate showed a good linear relationship, indicating that the electrode process is controlled by adsorption irreversible process. Differential pulse stripping voltammetry oxidation peak current (Ipa) and sulfadiazine concentration 1 × 10-6 ~ 1 × 10-4mol / L within a good linear relationship (r = 0.9977), the detection limit of 8.7 × 10 -7 mol / L (S / N = 3). The method has been used to analyze sulfadiazine tablets.