Simultaneous Electrochemical Determination of Dihydroxybenzene Isomers at 1-Butyl-3-Methylimidazolium Hexafluorophosphate Modified Pencil Graphite Electrode

IF 2.4 Q3 CHEMISTRY, MULTIDISCIPLINARY

Moroccan Journal of Chemistry Pub Date : 2021-02-14 DOI:10.48317/IMIST.PRSM/MORJCHEM-V9I2.19188

N. T. Tonu

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Abstract

A simplistic and inexpensive electrochemical platform has been fabricated for the simultaneous detection of Dihydroxybenzene Isomers (DHBIs); named- Hydroquinone (HQ), Catechol (CC) and Resorcinol (RS); in aqueous system. Cyclic Voltammetry (CV) and Differential Pulse Voltammetry (DPV) were adopted for the detection technique. 2B pencil (Faber Castell) collected from the resident stationary shop was used for fabricating Pencil Graphite Electrode (PGE) used as working electrode. PGE was characterized by SEM and EDX. It was modified electrochemically by ionic liquid, 1-Butyl-3-Methylimidazolium hexafluorophosphate (BIHP). Total analyses were performed in phosphate buffer solution (PBS) at pH 7.0. BIHP-PGE showed good selectivity and robust anti-interference for detection of HQ, CC and RS simultaneously in aqueous media. For HQ, CC and RS, the limit of detection is 9.09 μML -1 , 8.15 μM L -1 and 26.78 μM L -1 respectively and sensitivity is 525.21 μA/mM/cm 2 , 585.68 μA/mM/cm 2 and 178.00 μA/mM/cm 2 respectively at BIHP-PGE in simultaneous detection.

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在1-丁基-3-甲基咪唑六氟磷酸修饰铅笔石墨电极上同时电化学测定二羟基苯异构体

制备了一个简单廉价的电化学平台，用于同时检测二羟基苯异构体（DHBI）；命名为-氢醌（HQ）、邻苯二酚（CC）和间苯二酚（RS）；在水系统中。检测方法采用循环伏安法（CV）和微分脉冲伏安法（DPV）。2B铅笔（Faber Castell）从居民固定商店收集，用于制造用作工作电极的铅笔石墨电极（PGE）。用扫描电镜和能谱仪对PGE进行了表征。用离子液体1-丁基-3-甲基咪唑鎓六氟磷酸盐（BIHP）对其进行电化学改性。在pH 7.0的磷酸盐缓冲溶液（PBS）中进行总分析。BIHP-PGE对水介质中HQ、CC和RS的同时检测具有良好的选择性和较强的抗干扰能力。对于HQ、CC和RS，BIHP-PGE同时检测的检出限分别为9.09μML-1、8.15μML-1和26.78μML-1，灵敏度分别为525.21μA/mM/cm2、585.68μA/mM/cm2和178.00μA/mM/cm2。

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来源期刊

Moroccan Journal of Chemistry CHEMISTRY, MULTIDISCIPLINARY-

CiteScore

3.40

自引率

9.10%

发文量