Simultaneous determination of hydroquinone, catechol and resorcinol by voltammetry using graphene screen-printed electrodes and partial least squares calibration

TALANTA

卷:160

Article

Arago, Miriam¹  Arino, Cristina¹  Dago, Angela¹  Manuel Diaz-Cruz, Jose¹  Esteban, Miquel¹ 

[1] Univ Barcelona, Dept Quim Analit, Fac Quim, Marti & Franques 1-11, E-08028 Barcelona, Spain

关键词: Hydroquinone;    Catechol;    Resorcinol;    Voltammetry;    Screen-printed electrodes;    Partial least squares calibration;   

DOI  :  10.1016/j.talanta.2016.07.007

来源: Elsevier

【 摘 要 】

Catechol (CC), resorcinol (RC) and hydroquinone (HQ) are dihydroxybenzene isomers that usually coexist in different samples and can be determined using voltammetric techniques taking profit of their fast response, high sensitivity and selectivity, cheap instrumentation, simple and timesaving operation modes. However, a strong overlapping of CC and HQ signals is observed hindering their accurate analysis. In the present work, the combination of differential pulse voltammetry with graphene screen-printed electrodes (allowing detection limits of 2.7,1.7 and 2.4 mu mol L-1 for HQ CC and RC respectively) and the data analysis by partial least squares calibration (giving root mean square errors of prediction, RMSEP values, of 2.6, 4.1 and 2.3 for HQ CC and RC respectively) has been proposed as a powerful tool for the quantification of mixtures of these dihydroxybenzene isomers. The commercial availability of the screen printed devices and the low cost and simplicity of the analysis suggest that the proposed method can be a valuable alternative to chromatographic and electrophoretic methods for the considered species. The method has been applied to the analysis of these isomers in spiked tap water. (C) 2016 Elsevier B.V. All rights reserved.

【 授权许可】

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