Determination of uric acid in biological samples on the pretreated pencil graphite electrode

Alipour, Esmaeel; Majidi, Mir Reza; Saadatirad, Afsaneh; Golabi, S.M.

doi:10.1039/c2ay25463h

Cited by 24 publications

(13 citation statements)

References 54 publications

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“…As the electrode preparation is extremely fast, easy, and inexpensive, the present electrode seems to be an excellent means to make a voltammetric sensor to detect DIC in clinical laboratories. As Table shows, in comparison with other similar PPGEs, this electrode showed the same, and in some cases better, performance and is applicable for its specific analyte.…”

Section: Resultsmentioning

confidence: 55%

“…Recently, we utilized an electrochemically pretreated pencil graphite electrode (PPGE) successfully to develop various DNA hybridization biosensors . Additionally, PPGE was successfully used for the selective determination of dopamine, uric acid (UA), morphine, methadone and methamphetamine in biological and seized samples. Electrochemical pretreatment of the pencil graphite electrode (PGE) appears to be a simple and better strategy and is less time consuming in comparison with other modification procedures of the electrode surface .…”

Section: Introductionmentioning

confidence: 99%

“…Additionally, PPGE was successfully used for the selective determination of dopamine, uric acid (UA), morphine, methadone and methamphetamine in biological and seized samples. Electrochemical pretreatment of the pencil graphite electrode (PGE) appears to be a simple and better strategy and is less time consuming in comparison with other modification procedures of the electrode surface . This strategy avoids the use of some toxic compounds necessary in electrode surface modification.…”

Section: Introductionmentioning

confidence: 99%

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Pretreated Pencil Graphite Electrode as a Versatile Platform for Easy Measurement of Diclofenac Sodium in a Number of Biological and Pharmaceutical Samples

ParviziFard

Alipour

Sefidi

et al. 2018

J Chinese Chemical Soc

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A pretreated pencil graphite electrode (PPGE) as an electrochemical sensor was developed and applied to measure diclofenac sodium (DIC). The effects of both potentiostatic and potentiodynamic strategies in the electrochemical pretreatment and performance of the electrode were studied, and it was concluded that the former offers better analytical sensitivity for electroanalytical purposes. PPGE displayed good electrocatalytic activity in comparison to nonpretreated PGE (NPGE). Differential pulse voltammetry (DPV) was used to determine DIC. Therefore, a calibration graph was plotted between the variation of anodic peak currents and the DIC concentration, which was found to be linear in the range 0.23–12.95 μmol/L with the detection limit (S/N = 3) of 0.12 μmol/L. PPGE was utilized to determine DIC in real samples such as biological and pharmaceutical ones, and the good recovery values obtained demonstrated the high accuracy of the modified electrode.

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Section: Resultsmentioning

confidence: 55%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Pretreated Pencil Graphite Electrode as a Versatile Platform for Easy Measurement of Diclofenac Sodium in a Number of Biological and Pharmaceutical Samples

ParviziFard

Alipour

Sefidi

et al. 2018

J Chinese Chemical Soc

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“…These values indicate the total irreversibility of the electron transfer process and also confirm the ideal diffusion-controlled mechanism [36]. …”

Section: Resultsmentioning

confidence: 53%

Layered composites of PEDOT/PSS/nanoparticles and PEDOT/PSS/phthalocyanines as electron mediators for sensors and biosensors

García-Hernández¹,

Garcı́a²,

Martín-Pedrosa³

et al. 2016

Beilstein J. Nanotechnol.

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The sensing properties of electrodes chemically modified with PEDOT/PSS towards catechol and hydroquinone sensing have been successfully improved by combining layers of PEDOT/PSS with layers of a secondary electrocatalytic material such as gold nanoparticles (PEDOT/PSS/AuNPs), copper phthalocyanine (PEDOT/PSS/CuPc) or lutetium bisphthalocyanine (PEDOT/PSS/LuPc2). Layered composites exhibit synergistic effects that strongly enhance the electrocatalytic activity as indicated by the increase in intensity and the shift of the redox peaks to lower potentials. A remarkable improvement has been achieved using PEDOT/PSS/LuPc2, which exhibits excellent electrocatalytic activity towards the oxidation of catechol. The kinetic studies demonstrated diffusion-controlled processes at the electrode surfaces. The kinetic parameters such as Tafel slopes and charge transfer coefficient (α) confirm the improved electrocatalytic activity of the layered electron mediators. The peak currents increased linearly with concentration of catechol and hydroquinone over the range of 1.5 × 10−4 to 4.0 × 10−6 mol·L−1 with a limit of detection on the scale of μmol·L−1. The layered composite hybrid systems were also found to be excellent electron mediators in biosensors containing tyrosinase and laccase, and they combine the recognition and biocatalytic properties of biomolecules with the unique catalytic features of composite materials. The observed increase in the intensity of the responses allowed detection limits of 1 × 10−7 mol·L−1 to be attained.

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“…3 Therefore, it is essential to develop simple and rapid methods for the determination of MTD in routine analysis. 26,27 Recently, we have successfully used electrochemically pretreated pencil graphite electrode (PPGE) for development of various DNA hybridization biosensors, [28][29][30][31][32][33] selective determination of dopamine, 34 uric acid 34,35 and morphine 36 in biological and seized samples. 5 Various analytical methods have been applied to the determination of MTD.…”

Section: Introductionmentioning

confidence: 99%

Development of Simple Electrochemical Sensor for Selective Determination of Methadone in Biological Samples Using Multi‐walled Carbon Nanotubes Modified Pencil Graphite Electrode

Alipour

Majidi

Hoseindokht

2015

J Chinese Chemical Soc

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The electrochemical sensor was developed for determination of methadone (MTD) using multi‐walled carbon nanotubes (MWCNT) modified pencil graphite electrode (MWCNT‐PGE). It was found that the oxidation peak current of MTD at the MWCNT‐PGE was greatly improved compared with that of the bare‐PGE. At the MWCNT‐PGE, well‐defined anodic peak of MTD was observed at about 0.7 V (in pH 7 solution). The influence of several parameters on the determination of MTD was investigated. At optimum experimental conditions, differential pulse voltammetry (DPV) was used for determination of MTD, which exhibited a linear calibration graph of Ip versus MTD concentration in the range of 0.1–15 µM with a correlation coefficient of 0.9992. The calculated detection limit for S/N = 3 was 87 nM. It has been shown that the peaks obtained for oxidation of ascorbic acid (AA), uric acid (UA) and MTD in their mixture could be well resolved by differential pulse voltammetry, permitting us to develop a sensitive and selective electrochemical sensor for determination of MTD in the presence of AA and UA. Finally, MWCNT‐PGE was used for determination of MTD in biological samples, such as human serum and urine, using the standard addition procedure and the results were quite promising.

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Determination of uric acid in biological samples on the pretreated pencil graphite electrode

Cited by 24 publications

References 54 publications

Pretreated Pencil Graphite Electrode as a Versatile Platform for Easy Measurement of Diclofenac Sodium in a Number of Biological and Pharmaceutical Samples

Pretreated Pencil Graphite Electrode as a Versatile Platform for Easy Measurement of Diclofenac Sodium in a Number of Biological and Pharmaceutical Samples

Layered composites of PEDOT/PSS/nanoparticles and PEDOT/PSS/phthalocyanines as electron mediators for sensors and biosensors

Development of Simple Electrochemical Sensor for Selective Determination of Methadone in Biological Samples Using Multi‐walled Carbon Nanotubes Modified Pencil Graphite Electrode

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