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首页> 外文期刊>Electroanalysis >Oxidation of Protopine at a Pyrolytic Graphite Electrode Using Cyclic and Square-Wave Voltammetry
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Oxidation of Protopine at a Pyrolytic Graphite Electrode Using Cyclic and Square-Wave Voltammetry

机译:循环和方波伏安法在热解石墨电极上氧化原生皮

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摘要

This paper describes oxidation of the isoquinoline alkaloid, protopine (PR) at a pyrolytic graphite electrode (PGE) using cyclic and square -wave voltammetry. In the alkaline range (pH-7.5-10.5) of a Britton -Robinson (B -R) buffer, a PR oxidation can be observed as a well -developed voltammetric peak around +0.9 -V (vs. Ag|AgCl|3 -M KCl). With increasing pH of the B -R buffer, the PR peak is shifted to less positive potentials. The acquired voltammetric data suggest that PR strongly adsorbs onto the surface of the pyrolytic graphite where it is subjected to irreversible electrochemical oxidation in its uncharged free (tricyclic) base form. The results are discussed in connection with the electrochemical oxidation of other isoquinoline alkaloids and the potential applications of these data.
机译:本文描述了使用循环伏安法和方波伏安法在热解石墨电极(PGE)上氧化异喹啉生物碱,原松碱(PR)。在Britton-Robinson(B-R)缓冲液的碱性范围内(pH-7.5-10.5),可以观察到PR氧化为+0.9 -V(vs. Ag | AgCl | 3--左右)发达的伏安峰。 M KCl)。随着B -R缓冲液pH值的增加,PR峰移至正电位较小。所获得的伏安数据表明,PR强烈吸附在热解石墨的表面上,在该表面上,其以不带电荷的游离(三环)碱形式进行不可逆的电化学氧化。结合其他异喹啉生物碱的电化学氧化以及这些数据的潜在应用对结果进行了讨论。

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