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首页> 美国卫生研究院文献>The Journal of Automatic Chemistry >Online Coupling of Lab-on-Valve Format to Amperometry Based on Polyvinylpyrrolidone-Doped Carbon Paste Electrode and Its Application to the Analysis of Morin
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Online Coupling of Lab-on-Valve Format to Amperometry Based on Polyvinylpyrrolidone-Doped Carbon Paste Electrode and Its Application to the Analysis of Morin

机译：基于聚乙烯吡咯烷酮掺杂碳糊电极的阀上格式在线与电流表耦合及其在桑色素分析中的应用

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摘要

The potential capabilities and analytical performance of lab-on-valve (LOV) manifold as a front end to amperometry have been explored for the on-line determination of morin. Meanwhile, the electrochemical behaviors of morin were investigated based on polyvinylpyrrolidone- (PVP-) doped carbon paste electrode (CPE), which found that PVP can significantly improve its oxidation peak current. The excellent amperometric current response was achieved when the potential difference (ΔE) of 0.6 V was implemented in pH 6.5 phosphate buffer solution (PBS) that served as the supporting electrolyte. A well-defined oxidation peak has been obtained in studies using PVP as a modifier of CPE based on the oxidation of morin. The present work introduces the LOV technique as a useful tool for amperometric measurement, documents advantages of using programmable flow, and outlines means for miniaturization of assays on the basis of PVP modified CPE. The proposed method was applied successfully to the determination of morin in real samples, and the spiked recoveries were satisfactory.
机译：为了在线测定香豆素，已经探索了阀上实验室（LOV）歧管作为安培法前端的潜在功能和分析性能。同时，基于聚乙烯吡咯烷酮-（PVP-）掺杂碳糊电极（CPE）研究了茉莉的电化学行为，发现PVP可以显着提高其氧化峰值电流。当在用作支持电解质的pH 6.5磷酸盐缓冲溶液（PBS）中实现0.6？V的电势差（ΔE）时，可获得出色的安培电流响应。使用PVP作为基于Morin氧化的CPE改性剂的研究已经获得了明确定义的氧化峰。本工作介绍了LOV技术，作为一种用于安培测量的有用工具，记录了使用可编程流量的优势，并概述了基于PVP改性CPE的测定小型化的方法。所提方法成功地用于实际样品中香rin的测定，加标回收率令人满意。

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