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Electrochemical Behaviour Study and Determination of Guanine, 6‐Thioguanine, Acyclovir and Gancyclovir on Fluorine‐doped SnO2 Electrode. Application in Pharmaceutical Preparations
Electroanalysis ( IF 2.7 ) Pub Date : 2017-10-17 , DOI: 10.1002/elan.201700516
F. Martínez-Rojas 1 , M. A. Del Valle 1 , M. Isaacs 1 , Galo Ramírez 1 , F. Armijo 1
Affiliation  

An electroanalytical method using square wave voltammetry (SWV) is proposed for the quantification of Guanine (G), 6‐Thioguanine (TG), Acyclovir (Acy) and Ganciclovir (Gan) in different types of pharmacological samples. In addition, for the first time, a study of the electrochemical behavior (using cyclic voltammetry, CV) of guanine and its pharmacological derivatives on fluoride doped oxide (FTO) electrodes was carried out. The study of CV potential scanning demonstrated the charge transfer process was diffusion controlled and the diffusion coefficient was determined for all the studied products. Besides, electrochemical parameters, such as transfer coefficient, heterogeneous charge transfer constant and the number of electrons transferred (e) were determined namely, 4e for TG and 2e for G, Acy and Gan. SWV studies at pH 4 for G and 2 for TG, Acy and Gan showed linear ranges between 4.0×10−6 and 40.0×10−6 mol L−1, with detection limits of 0.91×10−6 for G, and 1.50×10−6 for TG, 1.25×10−6 for Acy and 0.45×10−6 mol L−1 for Gan. The method presents sensitivity and stability appropriate to be employed in quality control and routine quantification of drugs in pharmaceutical formulations.

中文翻译:

氟掺杂的SnO2电极上鸟嘌呤,6-硫鸟嘌呤,阿昔洛韦和更昔洛韦的电化学行为研究和测定。在药物制剂中的应用

提出了一种使用方波伏安法(SWV)的电分析方法对不同类型药理样品中的鸟嘌呤(G),6-硫代鸟嘌呤(TG),阿昔洛韦(Acy)和更昔洛韦(Gan)进行定量的方法。此外,首次研究了鸟嘌呤及其药理衍生物在氟化物掺杂氧化物(FTO)电极上的电化学行为(使用循环伏安法,CV)。CV电势扫描的研究表明,电荷转移过程受扩散控制,并且确定了所有研究产品的扩散系数。此外,确定了电化学参数,例如转移系数,异质电荷转移常数和转移的电子数(e),即TG为4e,G,Acy和Gan为2e。G在pH值为4时TG的SWV研究,而TG在SWV值为2时-6 40.0×10 -6 摩尔大号-1,具有0.91×10的检测限-6对于G,和1.50×10 -6为TG,1.25×10 -6为ACY和0.45×10 -6 摩尔大号- 1代表Gan。该方法具有适合用于药物制剂中药物的质量控制和常规定量的灵敏度和稳定性。
更新日期:2017-10-17
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