A novel electrochemical sensor for simultaneous determination of cadmium and lead using graphite electrodes modified with poly(p-coumaric acid)

Lima, Thaís Machado; Soares, Priscila Izabela; Nascimento, Luiza Aguiar do; Franco, Diego Leoni; Pereira, Arnaldo César; Ferreira, Lucas Franco

doi:10.1016/j.microc.2021.106406

Cited by 31 publications

(13 citation statements)

References 31 publications

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“…The process involves one electron detachment from the phenolate ion existing in the basic medium (the pKa of the FA phenolic group was 8.92 [36]) with the formation of a phenoxyl radical (Scheme 1), which undergoes further reactions of dimerization and polymerization similar to p-coumaric acid [12]. These data confirmed the formation of the insulating coverage and agree well with the data reported for hydroxyben-zoic [30][31][32][33] and other hydroxycinnamic acids [22,27]. The polymeric coverage obtained does not show electrochemical activity to allowing the use of its own response of the target compound for analytical purposes.…”

Section: Electrodeposition Of Polyfa On the Mwcnts/gcesupporting

confidence: 86%

“…Several electrochemical sensors based on electropolymerized caffeic acid have been described for the simultaneous voltammetric determination of ascorbic acid, epinephrine, and uric acid [14]; ascorbic acid and dopamine [15]; copper and lead [16]; as well as the individual quantification of L-3,4-dihydroxyphenylalanine (L-DOPA) [17], metanephrine [18], reduced nicotinamide adenine dinucleotide (NADH) [19], acetaminophen [20], and chloramphenicol [21]. Poly(p-coumaric acid)-modified graphite electrodes allow for the simultaneous determination of cadmium and lead [22]. Electrodeposition of the polymer is performed on the glassy carbon electrode (GCE) using a potentiodynamic mode.…”

Section: Introductionmentioning

confidence: 99%

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Layer-by-Layer Combination of MWCNTs and Poly(ferulic acid) as Electrochemical Platform for Hesperidin Quantification

et al. 2023

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The electrochemical polymerization of suitable monomers is a powerful way to create voltammetric sensors with improved responses to a target analyte. Nonconductive polymers based on phenolic acids were successfully combined with carbon nanomaterials to obtain sufficient conductivity and high surface area of the electrode. Glassy carbon electrodes (GCE) modified with multi-walled carbon nanotubes (MWCNTs) and electropolymerized ferulic acid (FA) were developed for the sensitive quantification of hesperidin. The optimized conditions of FA electropolymerization in basic medium (15 cycles from −0.2 to 1.0 V at 100 mV s−1 in 250 µmol L−1 monomer solution in 0.1 mol L−1 NaOH) were found using the voltammetric response of hesperidin. The polymer-modified electrode exhibited a high electroactive surface area (1.14 ± 0.05 cm2 vs. 0.75 ± 0.03 and 0.089 ± 0.003 cm2 for MWCNTs/GCE and bare GCE, respectively) and decreased in the charge transfer resistance (21.4 ± 0.9 kΩ vs. 72 ± 3 kΩ for bare GCE). Under optimized conditions, hesperidin linear dynamic ranges of 0.025–1.0 and 1.0–10 µmol L−1 with a detection limit of 7.0 nmol L−1 were achieved, which were the best ones among those reported to date. The developed electrode was tested on orange juice and compared with chromatography.

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Section: Electrodeposition Of Polyfa On the Mwcnts/gcesupporting

confidence: 86%

Section: Introductionmentioning

confidence: 99%

Layer-by-Layer Combination of MWCNTs and Poly(ferulic acid) as Electrochemical Platform for Hesperidin Quantification

et al. 2023

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“…In their molecular structures, some phenolic monomers subjected to electropolymerization usually contain specific functional groups that can be involved in reactions with biological catalysts (through covalent enzyme immobilization) acting in more sophisticated biorecognition layers [ 19 ] that are applicable in the development of specific analytical devices [ 20 ]. These functional groups include primary amino groups (polytyramine) [ 21 ], carboxylic groups (poly- p -coumaric acid) [ 22 ], etc. Thus, there is an assumption that it may be possible to prepare also polymers containing the carbonyl (R-CH=O) or formyl groups (Ar-CH=O) in an analogous way.…”

Section: Introductionmentioning

confidence: 99%

Electrodeposited Carbonyl Functional Polymers as Suitable Supports for Preparation of the First-Generation Biosensors

Sýs

Bártová

Mikýsek

et al. 2023

Sensors

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The aim of this electrochemical study was to ascertain which type of electrochemically deposited carbonyl functionalized polymer represents the most suitable electrode substrate for direct covalent immobilization of biological catalysts (enzymes). For this purpose, a triad of amperometric biosensors differing in the type of conductive polymers (poly-vanillin, poly-trans-cinnamaldehyde, and poly-4-hydroxybenzaldehyde) and in the functioning of selected enzymes (tyrosinase and alkaline phosphatase) has been compared for the biosensing of neurotransmitters (dopamine, epinephrine, norepinephrine, and serotonin) and phenyl phosphates (p-aminophenyl phosphate and hydroquinone diphosphate). The individual layers of the polymers were electrochemically deposited onto commercially available screen-printed carbon electrodes (type C110) using repetitive potential cycling in the linear voltammetric mode. Their characterization was subsequently performed by SEM imaging and attenuated total reflectance FTIR spectroscopy. Molecules of enzymes were covalently bonded to the free carbonyl groups in polymers via the Schiff base formation, in some cases even with the use of special cross-linkers. The as-prepared biosensors have been examined using cyclic voltammetry and amperometric detection. In this way, the role of the carbonyl groups embedded in the polymeric structure was defined with respect to the efficiency of binding enzymes, and consequently, via the final (electro)analytical performance.

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“…Recently, our research group described the poly(4-hydroxycinnamic acid) modification over GE for simultaneous determination of lead and cadmium by SWASV. The modified electrode presented a linear range for simultaneous determination of metals from 40 to 1000 μg L À 1 with a LOD of 15.4 and 13.6 μg L À 1 for Cd(II) and Pb(II), respectively, under optimized conditions [35].…”

Section: Introductionmentioning

confidence: 99%

“…The monomer dissolution in aqueous media at different pH values can generate three specific structures that can undergo electropolymerization and generates distinct polymeric films over the GE surface for application in the detection of metals, as performed with 4-hydroxycinnamic acid [35]. Some studies are described in the literature using modified electrodes with poly(CA) or CA with applications in the determination of epinephrine [37], cysteamine [38], L-cysteine [39], paracetamol [40,41], aspartame [42], and electrocatalytic oxidation of reduced nicotinamide adenine dinucleotide (NADH) [43].…”

Section: Introductionmentioning

confidence: 99%

Co‐detection of Copper and Lead in Artisanal Sugarcane Spirit Using Caffeic Acid‐modified Graphite Electrodes

et al. 2022

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Caffeic acid (CA)‐modified graphite electrodes [GE/poly(CA)] was applied to the co‐detection of copper and lead in artisanal sugarcane spirit using square‐wave anodic stripping voltammetry (SWASV). Electrochemical and morphological studies were performed, and a mechanism for polymerization was proposed. Electropolymerization, SWASV, and analysis conditions parameters were optimized. Interferents, repeatability, reproducibility, and addition and recovery tests were carried out. GE/poly(CA) shows a linear range from 15 to 705 μg/L with a limit of detection of 3.01 μg/L for Pb(II) and 4.50 μg/L for Cu(II). Real samples of artisanal sugarcane spirit were used, and the electrochemical results were compared with atomic absorption spectroscopy experiments.

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A novel electrochemical sensor for simultaneous determination of cadmium and lead using graphite electrodes modified with poly(p-coumaric acid)

Cited by 31 publications

References 31 publications

Layer-by-Layer Combination of MWCNTs and Poly(ferulic acid) as Electrochemical Platform for Hesperidin Quantification

Layer-by-Layer Combination of MWCNTs and Poly(ferulic acid) as Electrochemical Platform for Hesperidin Quantification

Electrodeposited Carbonyl Functional Polymers as Suitable Supports for Preparation of the First-Generation Biosensors

Co‐detection of Copper and Lead in Artisanal Sugarcane Spirit Using Caffeic Acid‐modified Graphite Electrodes

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