Electrochemical polymerized 5-amino-2-mercapto-1,3,4-thiadiazole modified single use sensors for detection of quercetin

Muti, Mihrican; Gençdağ, Kübra; Nacak, Fatma Merve; Aslan, Alican

doi:10.1016/j.colsurfb.2013.01.018

Cited by 37 publications

(18 citation statements)

References 32 publications

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“…Recently, polymer modified electrodes gained great interest due to their good stability, reproducibility, more active sites, homogeneity in electrochemical deposition [ 138 ], and improved response characteristics [ 156 ]. One of the most used technique for covering the electrode surfaces with polymeric films is electropolymerization; it can be realized by cyclic voltammetry [ 34 , 59 , 66 , 114 , 118 , 121 , 122 , 130 , 138 , 156 , 168 , 170 , 173 , 175 , 207 , 208 ], by applying a constant potential [ 41 , 112 , 183 ] or a constant current [ 62 , 153 , 172 , 178 ] to the bare or previously modified PGE immersed in the solution containing monomer and eventually other components. A dip-coating method was applied to modify a PGE from a casting solution containing carmoisine/polyaniline or copper-carmoisine complex/polyaniline [ 129 ].…”

Section: Discussionmentioning

confidence: 99%

“…In order to demonstrate the modification of a surface, different techniques are used to investigate and to compare the morphology and/or the electrochemical characteristics of the respective surface and/or of the modifier, before, during, or after the modification process. For surface morphology of bare or modified PGE investigations, different techniques of electron [ 3 , 15 , 24 , 28 , 29 , 32 , 34 , 35 , 54 , 60 , 65 – 67 , 85 , 111 , 118 – 122 , 126 – 128 , 130 , 135 , 141 – 143 , 145 – 148 , 158 , 161 , 170 , 173 , 175 , 178 , 181 – 183 , 189 , 198 , 200 , 204 , 205 , 210 , 216 , 218 , 219 ] and atomic force microscopy [ 28 , 29 , 60 , 65 – 67 , 112 , 126 , 172 , 198 , 205 ] are widely used. Sometimes, scanning electron microscopy (SEM) was coupled with energy-dispersive X-ray spectroscopy analysis [ 130 , 143 , 149 , 152 , 156 , 172 , 187 , 188 , 203 – 205 ].…”

Section: Discussionmentioning

confidence: 99%

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Pencil Graphite Electrodes: A Versatile Tool in Electroanalysis

David

Popa

Buleandră

2017

Journal of Analytical Methods in Chemistry

203

106

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Due to their electrochemical and economical characteristics, pencil graphite electrodes (PGEs) gained in recent years a large applicability to the analysis of various types of inorganic and organic compounds from very different matrices. The electrode material of this type of working electrodes is constituted by the well-known and easy commercially available graphite pencil leads. Thus, PGEs are cheap and user-friendly and can be employed as disposable electrodes avoiding the time-consuming step of solid electrodes surface cleaning between measurements. When compared to other working electrodes PGEs present lower background currents, higher sensitivity, good reproducibility, and an adjustable electroactive surface area, permitting the analysis of low concentrations and small sample volumes without any deposition/preconcentration step. Therefore, this paper presents a detailed overview of the PGEs characteristics, designs and applications of bare, and electrochemically pretreated and chemically modified PGEs along with the corresponding performance characteristics like linear range and detection limit. Techniques used for bare or modified PGEs surface characterization are also reviewed.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Pencil Graphite Electrodes: A Versatile Tool in Electroanalysis

David

Popa

Buleandră

2017

Journal of Analytical Methods in Chemistry

203

106

View full text Add to dashboard Cite

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“…23 Many studies have revealed that rutin is good for human health, such as antibacterial, antiulcer, anti-inflammatory, antiarrhythmia, antitumor, protective and expanding blood vessel. 24,25 Up to now, lots of analytical methods have been applied for the determination of rutin, including chemiluminescence, 26,27 high-performance liquid chromatography (HPLC), 28,29 capillary electrophoresis spectrophotometry, 30,31 UV-Vis spectrophotometry 32 and electrochemical methods. [33][34][35][36] In this work, Cu-doped carbon quantum dots (Cu-CQDs) were prepared by a facile one-step pyrolytic synthesis using Na 2 [Cu(EDTA)] as precursor.…”

Section: Introductionmentioning

confidence: 99%

Fluorescent Sensors Based on Cu-Doped Carbon Quantum Dots for the Detection of Rutin

Wang¹,

Shang²,

Zheng³

et al. 2018

J. Braz. Chem. Soc.

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In this paper, Cu-doped carbon quantum dots (Cu-CQDs) were prepared by carrying out thermolysis of Na 2 [Cu(EDTA)] and hydroxylamine hydrochloride at 300 °C for 2 h. The asprepared Cu-CQDs were characterized by UV-Vis, Fourier transform infrared (FTIR) spectroscopy, transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS) and X-ray diffraction (XRD). The Cu-CQDs exhibited good fluorescence property, high stability, excitationdependent emission behavior and a quantum yield of 9.8%. More significantly, the synthesized Cu-CQDs were developed for sensing rutin (RT) based on the fluorescence quenching of the prepared Cu-CQDs. A good linear relationship between the fluorescence quenching of Cu-CQDs and different concentrations of RT was obtained in the range of 0.1-15 μg mL -1 with a correlation coefficient of 0.9959. The detection limit was as low as 0.05 μg mL -1 (signal-to-noise ratio, S/N = 3). The possible mechanism of fluorescence quenching was explored, which was proved to be inner filter effect. Importantly, the proposed method was successfully applied in the detection of RT tablet samples and with satisfactory results, showing the practical applications.Keywords: Cu-doped carbon quantum dots, rutin, Na 2 [Cu(EDTA)], fluorescence sensors Rutin tablet samples pretreatment 10 pieces of rutin tablets were ground to powder in a mortar, and 10 mg of the powder was dissolved in 25 mL of ethanol. Recovery experiments were performed by adding different concentrations of rutin to the treated samples. Results and Discussion Characterization of Cu-CQDsThe optical properties of the Cu-CQD were investigated by UV-Vis absorption and fluorescence emission spectra. The UV-Vis spectrum (Figure 2a) showed two shoulders at Fluorescent Sensors Based on Cu-Doped Carbon Quantum Dots for the Detection of Rutin J. Braz. Chem. Soc. 990

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“…Among carbon based electrodes, pencil graphite electrodes (PGEs) have some advantages such as commercial availability with low cost, good mechanical rigidity, disposability, renewability, and ease of modification. Due to those useful and important characteristics, scientists have focused on the use of PGEs for phenolic compounds analysis (Buratti et al 2008;Muti et al 2013).…”

mentioning

confidence: 99%

Voltammetric determination of tannic acid in beverages using pencil graphite electrode

Vu¹,

Ertek²,

Dilgin³

et al. 2015

Czech J. Food Sci.

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Vu D.L., Ertek B., Dilgin Y., Červenka L. (2015): Voltammetric determination of tannic acid in beverages using pencil graphite electrode. Czech J. Food Sci., 33: 72-76.The pretreated pencil graphite electrode (Pre-PGE) prepared by a chronoamperometry technique was applied for the determination of tannic acid using anodic stripping differential pulse voltammetry. The currents obtained from voltammetry measurements at optimum conditions were linearly correlated with the concentration of tannic acid. Calibration curve was obtained for tannic acid in the concentration range of 5.0-500 × 10 -9 mol/l. The limit of detection was found to be 1.5 × 10 -9 mol/l. The content of tannic acid in beverage samples determined with Pre-PGE was in good agreement with that obtained by the standard spectrophotometric method.

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Electrochemical polymerized 5-amino-2-mercapto-1,3,4-thiadiazole modified single use sensors for detection of quercetin

Cited by 37 publications

References 32 publications

Pencil Graphite Electrodes: A Versatile Tool in Electroanalysis

Pencil Graphite Electrodes: A Versatile Tool in Electroanalysis

Fluorescent Sensors Based on Cu-Doped Carbon Quantum Dots for the Detection of Rutin

Voltammetric determination of tannic acid in beverages using pencil graphite electrode

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