Simultaneous Determination of Hydroquinone, Catechol and Resorcinol at Graphene Doped Carbon Ionic Liquid Electrode

Abstract

A new composite electrode has been prepared with doping graphene into the paste consisting graphite and ionic liquid, n-octyl-pyridinum hexafluorophosphate (OPFP). This electrode shows an excellent electrochemical activity for the redox of hydroquinone (HQ), catechol (CC), and resorcinol (RS). In comparison with bare paste electrode, the redox peaks of three isomers of dihydroxybenzene can be obviously, simultaneously observed at graphene doping paste electrode. Under the optimized condition, the simultaneous determination of HQ, CC, and RS in their ternary mixture can be carried out with a differential pulse voltammetric technique. The peak currents are linear to the concentration of HQ, CC, and RS in the range form 1 × 10 −5 to 4 × 10 −4 , 1 × 10 −5 to 3 × 10 −4 , and 1 × 10 −6 to 1.7 × 10 −4 mol L −1 , respectively. The limits of detection are 1.8 × 10 −6 mol L −1 for HQ, 7.4 × 10 −7 mol L −1 for CC, and 3.6 × 10 −7 M for RS, respectively.

Quantitative determination of hydroquinone via electrochemical methods at nano-architecture platinum electrode

“…17,18 The unique physicochemical characteristics of the mentioned materials have resulted in a better electrochemical response of the modified Pt electrode, particularly for the quantitative determination of trace analytes. 19,20 Pt powder in a pluronic, lyotropic, liquid crystal template (LLC) with remarkable chemical and thermal stability, acceptable electrochemical windows, and desirable conductivity properties has received considerable attention in modifying the ordinary Pt electrode. The LLC provides benefits such as improving the electron transfer rate, sensitivity, and conductivity of the nano-architecture Pt electrode compared to a bare Pt electrode.…”

Electrochemical Detection of Dihydroxybenzene Isomers at a Pencil Graphite Based Electrode

“…To overcome these defects, numerous efforts have been made to investigate new electrode materials capable of detecting HQ, CC, and RS simultaneously, which include glassy carbon electrode (GCE) modified with allura red polymeric film, multiwalled carbon nanotubes (MWCNTs), MWCNTs/poly­(1,5-diaminonaphthalene) composite film, MWCNTs/ionic liquid (IL) gel, Au nanoparticles (NPs) loaded on poly-3-amino-5-mercapto-1,2,4-triazole-MWCNTs film, AuNPs/sulfonated grapheme, poly amidosulfonic acid/MWCNTs, reduced graphene oxide/magnetite NPs/AuNPs composite, graphene–chitosan composite film, poly­(1,5-diaminonaphthalene), aspartic acid, tyrosinase immobilization with ordered mesoporous C–Au/L-lycine membrane/Au NPs, 3D-flower-like copper sulfide nanoflake-decorated carbon nanofragments, activated phosphate buffer solution (PBS), MWCNT/AgNPs, polyglutamic acid, 2-(phenylazo) chromotropic acid-(CH−) conducting polymer, electrochemically reduced grapheme oxide-poly­(Eriochrome black T)/Au NPs, poly­( p -aminobenzoic acid), tyrosinase/Au NPs encapsulated-dendrimer bonded conducting polymer, self-assembled Ti 3 C 2 /MWCNTs nanocomposites, C/Au nanostructured materials, graphene oxide/polymelamine composite, carbon nanocoils/zinc-tetraphenylporphyrin nanocomposite, nitrogen doped porous carbon nanopolyhedrons-MWCNTs hybrid materials, thionine/graphene oxide, gel of 1-butyl-3-methylimidazolium hexafluorophosphate (BMIHP)/MWCNTs, ammonium carbamate, poly­(malachite green)/MWCNT film, carboxy-functionalized CNTs/chitosan matrix/Au Nps, Pd NPs/poly­(1,5-diaminonaphthalene) matrix; pencil graphite electrode (PGE) modified with CNTs, BIHP, poly­(direct yellow 11), cobalt-phthalocyanine; mesoporous Pd electrode, poly­(crystal violet); flexible screen printed carbon electrode; graphene sheets embedded carbon films; poly­(adenine)/graphene paste electrode; carbon ionic liquid electrode modified with graphene, Au NPs/graphene; gold electrode modified with gold atomic cluster-poly­(3,4-ethylenedioxidethiophene) nanocomposite, etc. However, it remains challenging to investigate novel electrode materials for simultaneous detection of DHBIs with a wide linear range and higher sensitivity.…”

Voltammetric Approach for Pharmaceutical Samples Analysis; Simultaneous Quantitative Determination of Resorcinol and Hydroquinone

“…To improve the electrochemical conductivities of bare CPE, room temperature ionic liquid and synthesized nanoparticles namely 1-ethyl-3-methylimidazolium tetra uoroborate and ZnFe 2 O 4 used as the modi ers to form a stable carbon paste composite in the current work, respectively. The unique physicochemical characteristics of the mention materials resulted in a better electrochemical response of the modi ed CPE particularly for the quantitative determination of trace analytes [15,16]. Ionic liquids (ILs) with remarkable chemical and thermal stability, acceptable electrochemical windows and desirable ionic conductivity properties received considerable attention in modifying the CPEs.…”