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A Sensitive Voltammetric Sensor Based on Synergistic Effect of Graphene-Polyaniline Hybrid Film for Quantification of Calcium Antagonist Lercanidipine

机译:基于石墨烯-聚苯胺杂化膜协同效应的灵敏伏安传感器,用于定量钙拮抗剂Lercanidipine

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摘要

A chemically modified sensor based on the synergistic effect of graphene and polyaniline for electrochemical sensing of calcium antagonist lercanidipine (LCP) has been developed. Scanning electron microscopy, electrochemical impedance spectroscopy, square-wave voltammetry, and cyclic voltammetry were utilized to characterize the morphology and electroanalytical performance of the fabricated sensor. Under optimized conditions, reduction peak current was linear over the wide concentration range from 5 to 125 ng mL~(-1) with correlation coefficient of 0.9998. The limit of detection and the limit of quantification were found to be 1.94 and 5.89 ng mL~(-1). The developed sensor also exhibited good reproducibility and long-term stability. In addition, the proposed method was successfully applied to the determination of LCP in pharmaceutical formulation which is proved by recovery studies. Graphene- polyaniline composites are expected to be promising material for biosensing applications because of the ease of fabrication, excellent electrochemical performance, and high electroactive surface area. VC 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014, 131, 40959.
机译:已经开发出一种基于石墨烯和聚苯胺的协同作用的化学修饰传感器,用于钙拮抗剂乐卡地平(LCP)的电化学传感。利用扫描电子显微镜,电化学阻抗谱,方波伏安法和循环伏安法来表征所制造传感器的形态和电分析性能。在最佳条件下,还原峰电流在5〜125 ng mL〜(-1)的宽浓度范围内呈线性关系,相关系数为0.9998。检出限和定量限分别为1.94和5.89 ng mL〜(-1)。开发的传感器还具有良好的重现性和长期稳定性。此外,该方法已成功地用于药物制剂中LCP的测定,这已通过回收率研究证明。石墨烯-聚苯胺复合材料由于易于制造,出色的电化学性能和高电活性表面积,有望成为生物传感应用中有希望的材料。 VC 2014 Wiley Periodicals,Inc. J. Appl。 Polym。科学2014,131,40959。

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