摘要
对硫普罗宁在汞膜电极上的伏安行为进行了研究。在pH2.87Britton Robinson缓冲液中,硫普罗宁于-0.42V(vs.Ag/AgCl)处产生良好的阴极还原峰。当硫普罗宁浓度在2.0×10-7～2.0×10-6mol·L-1范围内时与线性扫描还原峰电流呈线性关系,据此对硫普罗宁片剂的含量进行了测定,取得了满意的结果。用线性扫描与循环伏安法探讨了该体系的伏安行为,结果表明,硫普罗宁在汞膜电极上的电化学还原机理为具有吸附性的不可逆过程。
In a Britton-Robinson buffer medium of pH 2.87, a sensitive reductive potential peak of thiopronine was observed at -0.42V (vs.Ag/AgCl) at the mercury membrane electrode. Linear relationship was held between the peak current (i_p) and the concentration of thiopronine in the range from 2.0×10^(-7) to 2.0×10^(-6)mol·L^(-1). Mechanism of the electrode reaction was studied by linear scanning and cyclic voltammetry. The results of the study showed that electro-reduction of thiopronine at the mercury membrane electrode is an adsorptive-irreversible process. This proposed method has been used in the analysis of thiopronine tablets giving satisfactory results.
出处
《理化检验（化学分册）》
CAS
CSCD
北大核心
2004年第2期63-65,共3页
Physical Testing and Chemical Analysis(Part B:Chemical Analysis)
