Electrocatalytic Oxidation of Sulfur Containing Amino Acids at Renewable Ni‐Powder Doped Carbon Ceramic Electrode: Application to Amperometric Detection <scp>L</scp>‐Cystine, <scp>L</scp>‐Cysteine and <scp>L</scp>‐Methionine

Salimi, Abdollah; Roushani, Mahmoud

doi:10.1002/elan.200603639

Cited by 45 publications

(16 citation statements)

References 36 publications

(24 reference statements)

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“…Recently, we have used nickel powder carbon ceramic electrode and GCE modified by NiO nanoparticles for the determination of amino acids in alkaline solutions [28,29].…”

Section: Introductionmentioning

confidence: 99%

Novel electrochemical sensor based on carbon nanodots/chitosan nanocomposite for the detection of tryptophan

Roushani

Sarabaegi

2015

J IRAN CHEM SOC

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formulations to supplement the current typical diet which is deficient in vegetables. Improper metabolization of Trp may lead to a waste product in the brain or cause hallucination and delusion [3]. Hence, the sensitive and selective determination of Trp is highly essential. Several methods have been reported for the determination of Trp in biological and pharmaceutical samples such as high-performance liquid chromatography [4], spectrophotometry [5], fluorimetry [6] and capillary electrophoresis [7]. Although these methods are successfully used to determine Trp, they have several drawbacks including long analysis time, poor reproducibility, pre-cleaning of the matrix, pre-treatment of the sample and low detection limits. On the other hand, electrochemical method of determination is less expensive, more convenient, easy in handling, as well as with high sensitivity and selectivity. Several studies have been conducted in this area [8][9][10][11][12][13][14]. The results of such studies have revealed that the voltammetric response of the electrochemical process is not satisfactory due to slow heterogeneous electron transfer on the electrode surface and consequent high overpotentials of the electrochemical oxidation [15,16]. Therefore, one of the main challenges in this field is to select the suitable materials for the electrode surface modification that can increase the direct electron transfer between the electrode surface and redox molecule.Among different nanomaterials, carbon nanomaterials have attracted great interest in electroanalytical investigations because of their chemical and mechanical properties, wide potential window, and suitability for different types of analysis [17,18]. Given these unique properties, carbon nanomaterials such as carbon nanotubes (CNTs) [19][20][21], fullerene-C 60 [22], carbon nanofibers (CNFs) [23][24][25], and CNDs [26] have been widely used for modification of the electrode's surface. As new and interesting members of carbon family, CNDs have attracted great attention due to their Abstract A modified glassy carbon electrode (GCE) was prepared by incorporating carbon nanodots (CNDs) and chitosan (CS) for the determination of tryptophan (Trp). In this method, the electrochemical response of Trp was examined and the irreversible electrochemical oxidation and two electrons involved in the process of Trp were demonstrated. Because of good conductivity, large surface area, and excellent catalytic activity of CNDs, the CS and CNDs hybrid film extremely increased the electrochemical response of Trp, offering a highly sensitive electrochemical sensor for determination of Trp. The sensor showed a low detection limit of 90 nM and high sensitivity of 4 nA µM −1 . The high stability and simplicity of prepared nanohybrid combined with excellent sensitivity and selectivity of the sensor may bring novel and interesting applications for different diagnoses. As a way forward, the proposed methodology is promised for fabrication of the other effective and sensitive sensors

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“…Recently, we have used nickel powder carbon ceramic electrode and GCE modified by NiO nanoparticles for the determination of amino acids in alkaline solutions [28,29].…”

Section: Introductionmentioning

confidence: 99%

Novel electrochemical sensor based on carbon nanodots/chitosan nanocomposite for the detection of tryptophan

Roushani

Sarabaegi

2015

J IRAN CHEM SOC

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“…In the past, research on the synthesis of nanosized porous nickel oxide materials and its applications in catalytic reactions, industrial processes and electrochromic devices has been rather intense [39][40][41]. Furthermore, due to the excellent electrocatalytic activity and good antifouling properties of electrodes modified with nickel oxide, these modified electrodes have been used for electrocatalytic oxidation and determination of insulin, thiols, disulfides, mercaptans, and sulfur oxoanions [42][43][44]. In this study, due to chemical stability and electrochemical reversibility of Ni(II)/Ni(III) redox couple, glassy carbon electrode modified with nickel oxide nanoparticles was successfully used for oxidation of sulfoxide functional group in omeprazole and pantoperazole to sulphone derivatives.…”

Section: Introductionmentioning

confidence: 99%

Sensitive amperometric detection of omeprazole and pantoperazole at electrodeposited nickel oxide nanoparticles modified glassy carbon electrode

Salimi

Enferadi

Noorbakhash

et al. 2011

J Solid State Electrochem

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Glassy carbon electrode modified with electrodeposited nickel oxide nanoparticles (NiOxNPs) was used as electrocatalyst for oxidation of omeprazole and pentoperazole in alkaline solution. The modified electrode exhibited efficient electrocatalytic activity for the oxidation of omeprazole and pentoperazole with relatively high sensitivity, excellent stability, and long lifetime. Hydrodynamic amperometric method is used for determination of selected analytes. Under optimized condition, the linear concentration range, detection limit, and sensitivity of modified electrode toward omeprazole detection are 4.5-120 μM, 0.4 μM (at signal to noise 3), and 40.1 nA μM −1 cm −2 , respectively. For pantoperazole, hydrodynamic amperometric determination yielded calibration curve with linear range of 2.5-180 μM, detection limit of 0.2 μM, and sensitivity of 39.2 nA μM −1 cm −2 , respectively. The proposed method was successfully applied to pentoperazole and omeprazole determination in drug samples.

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“…The sensitivity was found to be approximately 637 nA mM À1 cm À2 by using the geometric surface area, which is much larger than those previously reported at different electrodes. [15][16][17][18][19][20][21][23][24][25][26][27][28] Thus, the present Pt-NiCo nanostructures showed excellent analytical per-A C H T U N G T R E N N U N G formA C H T U N G T R E N N U N G ance for CySH detection at the very low potentials, such as relatively high sensitivity, a low detection limit, and a broad linear range. The potential interferences, including K + , Ca 2 + , Na + , Mg 2 + , uric acid (UA), ascorbic acid (AA), dopamine (DA), and glucose, for the detection of thiols were also examined.…”

Section: Resultsmentioning

confidence: 98%

Pt–NiCo Nanostructures with Facilitated Electrocatalytic Activities for Sensitive Determination of Intracellular Thiols with Long‐Term Stability

Feng

Wen

Cheng

et al. 2010

Chemistry A European J

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A Pt-NiCo nanomaterial has been synthesized for developing the sensitive electrochemical determination of biological thiols that include L-cysteine (CySH), homocysteine (HCySH), and gluthione (GSH) with high sensitivity and long-term stability, in which the Pt nanoparticles are well supported on amorphous NiCo nanofilms. The electrochemical oxidation of thiols has been successfully facilitated on the optimized Pt-NiCo nanostructures, that is, two oxidation peaks of CySH have been clearly observed at potentials of +0.06 and +0.45 V. The experimental results demonstrate that the first peak for CySH oxidation may be attributed to a direct oxidation from CySH to L-cystine (CySSCy), whereas the second peak possibly results from a sequential oxidation from CySSCy to cysteic acid (CySO(3)H), together with a direct oxidation of CySH into CySO(3)H. The enhanced electrocatalytic activities at the Pt(23)-NiCo nanostructures have provided a methodology to determine thiols at a very low potential of 0.0 V with relatively high sensitivity (637 nA μM cm(-2)), a low detection limit (20 nM), and a broad linear range. The striking analytical performance, together with the characteristic properties of the Pt-NiCo nanomaterial itself, including long-term stability and strong antipoisoning ability, has established a reliable and durable approach for the detection of thiols in liver cancer cells, Hep G2.

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Electrocatalytic Oxidation of Sulfur Containing Amino Acids at Renewable Ni‐Powder Doped Carbon Ceramic Electrode: Application to Amperometric Detection L‐Cystine, L‐Cysteine and L‐Methionine

Cited by 45 publications

References 36 publications

Novel electrochemical sensor based on carbon nanodots/chitosan nanocomposite for the detection of tryptophan

Novel electrochemical sensor based on carbon nanodots/chitosan nanocomposite for the detection of tryptophan

Sensitive amperometric detection of omeprazole and pantoperazole at electrodeposited nickel oxide nanoparticles modified glassy carbon electrode

Pt–NiCo Nanostructures with Facilitated Electrocatalytic Activities for Sensitive Determination of Intracellular Thiols with Long‐Term Stability

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