Low Cost Electrochemical Sensor for Simultaneous Detection and Estimation of Dihydroxybenzene Isomers

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2022-01-01 DOI:10.4152/pea.2022400105

N. T. Tonu, M. A. Yousuf

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引用次数: 2

Abstract

An ionic liquid (IL) based pencil graphite electrode (PGE) sensor was electrochemically fabricated for hydroquinone (HQ), catechol (CC) and resorcinol (RS) simultaneous detection and estimation in aqueous media. PGE surface was modified by 1-hexylpyridinium hexafluorophosphate (HPHP) using cyclic voltammetry (CV). The modified surface was characterized by scanning electron microscope (SEM) and energy dispersive X-ray microanalysis (EDX). The modified electrode showed an excellent electro-analytical activity towards simultaneously HQ, CC and RS, at pH 6.8 in aqueous media. The scan rate effect was diffusion controlled and the concentration effect was linear with current. The limit of detection (LOD) for HQ, CC and RS was found to be 6.38 μmol L¹, 4.56 μmol L¹ and 19.6 μmol L¹, respectively. The sensitivity for HQ, CC and RS was found to be 448.49 μAmM -1 cm -2 , 627.35 μAmM -1 cm -2 and 146.10 μAmM −1 cm −2 , respectively, in a ternary mixture of dihydroxybenzene isomers (DHBIs). The cost of using PGE was lower than that of the conventional electrodes. isomers, ionic liquid, pencil graphite electrode and differential pulse voltammetry.

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低成本电化学传感器用于同时检测和估计二羟基苯异构体

采用电化学方法制备了离子液体铅笔石墨电极(PGE)传感器，用于水中对苯二酚(HQ)、儿茶酚(CC)和间苯二酚(RS)的同时检测和估计。采用循环伏安法(CV)对PGE表面进行了六氟磷酸1-己基吡啶(HPHP)修饰。用扫描电镜(SEM)和能谱x射线微分析(EDX)对改性后的表面进行了表征。在pH为6.8的水溶液中，改性电极同时对HQ、CC和RS具有良好的电分析活性。扫描速率效应受扩散控制，浓度效应与电流呈线性关系。检测限(LOD)分别为6.38 μmol L¹、4.56 μmol L¹和19.6 μmol L¹。在二羟基苯异构体(DHBIs)的三元混合物中，HQ、CC和RS的灵敏度分别为448.49 μAmM -1 cm -2、627.35 μAmM -1 cm -2和146.10 μAmM -1 cm -2。使用PGE的成本低于传统电极。异构体，离子液体，铅笔石墨电极和差分脉冲伏安法。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.