Electrocatalytic study of an electrode modified with Reactive Blue 4 dye covalently immobilized on amine-functionalized silica

Martin, Cibely S.; Teixeira, Marcos F.S.

doi:10.1007/s10008-012-1829-x

Cited by 9 publications

(6 citation statements)

References 49 publications

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“…The analytical parameters obtained are presented in Table 3, as well as of other sensors recently published in the literature. Higher sensitivities were obtained in [12,14], but with narrower linear ranges. Detection limits were similar to those in [12] and much lower than in [9]; although they were higher than those in [13,42,43] ( [13,43] using stripping voltammetric techniques), in these cases, the upper linear range limits were only 2.6 μM [13,43] and 16 μM [42].…”

Section: Dipyrone Determinationmentioning

confidence: 83%

“…Although sensitive, these techniques are not suitable for routine analysis being time consuming or involving sample preparation before detection. Both acetaminophen and dipyrone are electroactive, so that different electrochemical methods have been used for their detection [10][11][12][13]. In relation to determination at electrodes modified with CNT, there is only one study on the determination of dipyrone at a CNT-modified graphite-epoxy resin composite electrode, GrCE [14] and for acetaminophen; most of the recent work is based on carbon nanotube paste electrodes (CNTPE) [15][16][17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

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Poly(thionine)-carbon nanotube modified carbon film electrodes and application to the simultaneous determination of acetaminophen and dipyrone

Ghica

Ferreira

Brett

2015

J Solid State Electrochem

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Multi-walled carbon nanotube (MWCNT)-poly(thionine) (PTH) nanostructures were formed on carbon film electrodes (CFE), the polymer film being formed beneath or on top of MWCNT, to give two different sensor architectures, PTH/MWCNT/CFE or MWCNT/PTH/CFE. Characterization of the novel nanostructures was carried out by cyclic voltammetry, electrochemical impedance spectroscopy and scanning electron microscopy. The modified electrodes were then used for sensing acetaminophen (ACOP) and dipyrone by differential pulse voltammetry and fixedpotential amperometry independently and simultaneously. Analytical parameters were determined and the results compared with similarly modified electrodes reported in the literature. An interference study as well as recovery measurements in pharmaceutical samples was successfully performed.

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Section: Dipyrone Determinationmentioning

confidence: 83%

Section: Introductionmentioning

confidence: 99%

Poly(thionine)-carbon nanotube modified carbon film electrodes and application to the simultaneous determination of acetaminophen and dipyrone

Ghica

Ferreira

Brett

2015

J Solid State Electrochem

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“…(2nd) the specific hydrogen interactions in the reduced quinone form could explain the difference in TTC oxidation for pH values below 4.0. After the electron/proton transfer to the para-or orthophenol moieties, strong intramolecular hydrogen interactions can take place [47] due to the high acidity of the environment. The sequence of the oxidation reaction is described as two rounds of electron-transfer coupled with the output of a proton (Scheme 2).…”

Section: Electrooxidation Of Tetracycline At the Ptnps/c/gcementioning

confidence: 99%

Construction of an electrochemical sensing platform based on platinum nanoparticles supported on carbon for tetracycline determination

Kushikawa

Silva

Angelo

et al. 2016

Sensors and Actuators B: Chemical

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a b s t r a c tIn this paper, we report the construction of an electrochemical sensing platform based on platinum nanoparticles supported on carbon (PtNPs/C) for the determination of the antibiotic tetracycline (TTC). Initially, the PtNPs/C was synthesized and characterized by powder X-ray diffraction spectroscopy and transmission electron microscopy. The effect of experimental parameters on the electrochemical behavior of the PtNPs/C coated glassy carbon electrode (PtNPs/C/GCE), including the amount of PtNPs and electroactive area, scan rate and pH, were evaluated. The electrooxidation of TTC on the PtNPs/C/GCE was investigated by cyclic voltammetry and differential pulse voltammetry, with the determination of TTC electrooxidation mechanism. Under optimum experimental conditions, the linear calibration range, detection limit, quantification and sensitivity of the PtNPs/C/GCE were 9.99-44.01 mol L −1 , 4.28 mol L −1 , 14.3 mol L −1 and 3.32 A L mol −1 cm −2 , respectively. Finally, the proposed electrochemical sensing platform was successfully applied to determine low TTC concentrations in urine samples, suggesting its great applicability in clinical analysis and quality control.

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“…When CI Reactive Blue 4 is in neutral or alkaline aqueous solution, sulphonic acid groups are predominantly dissociated as sulphonate anions. In the situation where pH decreases, oxy and amino groups can be protonated, as proposed by Martin and Teixeira in 2012; the same was observed by Gao and Wang with Methylene Orange . The dichlorotriazine groups are kept in chlorine atoms in acidic or neutral medium.…”

Section: Resultsmentioning

confidence: 54%

Extraction of reactive dyes from aqueous solutions by halogen‐free ionic liquids

Castillo-Cervantes

Lijanova

Likhanova

et al. 2019

Coloration Technology

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Dyes are commonly used in various industries and unfortunately many of them are discharged into water bodies, causing environmental problems. In the current study, three hydrophobic, halogen‐free ionic liquids were synthesised and their capability as extracting agents was evaluated using four reactive dyes (CI Reactive Blue 4, CI Reactive Black 5, CI Reactive Orange 16 and CI Reactive Red 2). The ionic liquids, immiscible with the aqueous phase, could extract the reactive dyes from aqueous solutions, withdrawing the same amount of weight. The effects of pH and temperature on the extraction process were also studied. Trioctylmethyl ammonium ethylenediaminetetraacetate displayed a high extraction efficiency (99%), where only 33 mg of ionic liquids extracted 50 mg of CI Reactive Blue 4. Fourier Transform–infrared spectroscopy was used to screen the interaction between the ionic liquid and CI Reactive Blue 4 during the extraction stage.

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Electrocatalytic study of an electrode modified with Reactive Blue 4 dye covalently immobilized on amine-functionalized silica

Cited by 9 publications

References 49 publications

Poly(thionine)-carbon nanotube modified carbon film electrodes and application to the simultaneous determination of acetaminophen and dipyrone

Poly(thionine)-carbon nanotube modified carbon film electrodes and application to the simultaneous determination of acetaminophen and dipyrone

Construction of an electrochemical sensing platform based on platinum nanoparticles supported on carbon for tetracycline determination

Extraction of reactive dyes from aqueous solutions by halogen‐free ionic liquids

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