Detection Of Dihydroxybenzene Isomers Research Articles

Synergetic effects of a poly-tartrazine/CTAB modified carbon paste electrode sensor towards simultaneous and interference-free determination of benzenediol isomers

Simultaneous and selective detection of dihydroxy benzene isomers by the synergistic effect of CTAB and tartrazine on a carbon paste electrode (poly-TZ/CTAB/MCPE) sensor by CV and DPV techniques.

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

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.

Interference Free Simultaneous Detection of Dihydroxy Benzene Isomers at Cost‐effective and Reliable Celestine Blue Modified Glassy Carbon Electrode

AbstractA successful cyclic voltammetric electropolymerisation and electrochemical characterization of celestine blue (CB) was achieved on glassy carbon electrode (GCE). The fabricated electrode was then used for the electroanalysis of hydroquinone (HQ) and catechol (CC). Due to the improved electrocatalytic activity of the fabricated electrode, an interference free simultaneous detection of CC by HQ was observed. The scan rate studies suggest the diffusion‐controlled kinetics phenomenon at the modified electrode. Concentration studies, yielding a limit of detection (LoD) of 0.0491 μM and 0.0456 μM for CC and HQ respectively in the first linear range of 0 to 40 μM, limit of detection of 0.0621 μM and 0.0638 μM for CC and HQ respectively in the second linear range of 50 to 120 μM, which were relatively lower as compared to previous reports was achieved by using differential pulse voltammetry (DPV). In order to evaluate the analytical performance of the CB/GCE, tap water sample analysis was carried out and good recovery results were obtained.