Electrodeposited reduced graphene oxide incorporating polymerization of l-lysine on electrode surface and its application in simultaneous electrochemical determination of ascorbic acid, dopamine and uric acid

Zhang, Dongdong; Li, Lingzhi; Ma, Weina; Xia, Chen; Zhang, Yanmin

doi:10.1016/j.msec.2016.08.078

Cited by 96 publications

(38 citation statements)

References 44 publications

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“…The LOD was calculated based on the ratio between three times the standard deviation of the blank and the slope of the analytical curve. In comparison with the data reported in the literature, the achieved LOD is lower than the value found by Thiagarajan et al 36 and higher than the LODs found by other authors, including da Silva et al, 37 Kalimuthu et al, 38 Qi et al, 39 Zheng et al, 40 Wang et al, 41 Zhang et al, 42 and Taei et al 43 It is important to highlight that all mentioned reports explored modified electrodes for detecting AA. On the other hand, the proposed ePADs were used without any modification, making the electrode fabrication simpler, easier and cheaper than previous studies.…”

Section: Detection Of Ascorbic Acid By Square Wave Voltammetrymentioning

confidence: 50%

Determination of Ascorbic Acid in Commercial Tablets Using Pencil Drawn Electrochemical Paper-based Analytical Devices

et al. 2018

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This study describes the use of electrochemical paper-based analytical devices (ePADs) drawn with graphite pencil for the determination of ascorbic acid (AA) in commercial tablets. ePADs were fabricated using vegetal paper and graphite pencil. First, the three-electrode electrochemical cell drawn using a graphical software and toner lines were laser printed on the vegetal paper surface to delimit the electrode areas. Then, the electrode regions were manually painted with graphite pencil. Afterwards, the pseudo-reference electrode was defined with the deposition of silver ink over the graphite surface. Cyclic voltammetry and square wave voltammetry (SWV) experiments were performed to optimize the electroanalytical parameters as well as to quantitatively determine the AA concentration in two commercial tables. ePADs exhibited linear behavior for a concentration range between 0.5 and 3.0 mmol L. The achieved limit of detection and sensitivity were 70 μmol L and 0.47 μA/mmol L, respectively. The AA concentration levels found by SWV experiments in both Cenevit and Energil C were 2.80 ± 0.02 and 3.10 ± 0.01 mmol L, respectively. The accuracy of the proposed devices was investigated through recovery experiments in three concentration levels and it presented values between 95 and 115%.

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Section: Detection Of Ascorbic Acid By Square Wave Voltammetrymentioning

confidence: 50%

Determination of Ascorbic Acid in Commercial Tablets Using Pencil Drawn Electrochemical Paper-based Analytical Devices

et al. 2018

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“…The potential controlled partial reduction of graphene oxide is also helpful to improve the sensitivity and specifically selectivity for the certain biomolecules . Similarly, the L‐lysine was electropolymerized by successive direct electrochemical reduction of GO on the surface of GCE for simultaneous sensing of the analytes .…”

Section: Comparison Of the Modified Electrodes For Simultaneous Sensimentioning

confidence: 99%

Modified Electrodes for Selective Voltammetric Detection of Biomolecules

2018

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Electrochemical sensors for selective analysis of biomolecules got tremendous attention due to their better sensitivity and construction possibility of the portable cost‐effective devices. The individual or simultaneous sensing of ascorbic acid (AA), dopamine (DA), and uric acid (UA) is challenging due to their close electrooxidation and co‐existing. Recent years, substantial progress is made to develop electrode with smart materials to overcome the issue related to simultaneous sensing. This review is comparatively consolidating the work was done in fabrication of electrochemical sensors for the simultaneous sensing of AA, DA and UA. The various modification materials such as graphene, CNTs, conductive polymers and the ionic liquids characteristics are concisely described with their figure of merits. In the end, the critical analysis, future prospects, and challenges in commercialization are described.

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“…Alternatively, it has been found that nanomaterials features are affected by their sizes and architecture, in particular, because of their surface instead of the nature of bulk atoms [12]. Extreme ratios of surface-tovolume in nano-materials offer these substances a number of benefits, including rapid reaction kinetic, and make them suitable alternatives for single-molecule determinations.…”

Section: Introductionmentioning

confidence: 99%

A nano-sensor based on screen printed electrode (SPE) for electro-chemical detection of vitamin B9

Aflatoonian

Tajik

Ekrami‐Kakhki

et al. 2020

Eurasian Chem. Commun.

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The present study designed an electro-chemical instrument with high sensitivity and selectivity on the basis of a SPE modified with La +3 /Co3O4 nano-cubes in order to analyze vitamin B9. It was confirmed that this sensor possesses very good electronmoderating behaviors to oxidize vitamin B9 in a 0.1 M phosphate buffer solution (PBS) (pH=7.0). In addition, according to optimal conditions (pH=7.0), a potential around 110 mV less positive than the one in the un-modified electrodes is required for vitamin B9 oxidation at this electrode surface. This technique limit of determination for vitamin B9 has been estimated to be 0.3 μM (S/N = 3). Responses have been linear in concentrations range between 1.0 and 600.0 μM. The modified electrode has been applied to detect vitamin B9 in real specimens, which was accompanied by acceptable outputs. Experiments showed that La +3 /Co3O4 nano-cubes will be valuable electrode materials providing a high ratio of surface to volume that enhances sensitivity. The study introduces a novel sensor with simpleness, quickness, sensitivity, and affordability features to quantify vitamin B9. A nano-sensor based on screen printed electrode (SPE) for electro-chemical detection of vitamin B 9 .

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Electrodeposited reduced graphene oxide incorporating polymerization of l-lysine on electrode surface and its application in simultaneous electrochemical determination of ascorbic acid, dopamine and uric acid

Cited by 96 publications

References 44 publications

Determination of Ascorbic Acid in Commercial Tablets Using Pencil Drawn Electrochemical Paper-based Analytical Devices

Determination of Ascorbic Acid in Commercial Tablets Using Pencil Drawn Electrochemical Paper-based Analytical Devices

Modified Electrodes for Selective Voltammetric Detection of Biomolecules

A nano-sensor based on screen printed electrode (SPE) for electro-chemical detection of vitamin B9

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