Sensing and Monitoring

Karimi‐Maleh, Hassan; Beheshti, Aliasghar; Karimi, Fatemeh; Shabani-Nooshabadi, Mehdi; Ganjali, Mohammad Reza; Rezapour, Morteza

doi:10.1007/978-3-319-95603-9_8

Cited by 11 publications

(11 citation statements)

References 78 publications

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“…As depict in Figure S1, the oxidation peak current of SOT is linearly correlated with scan rates; I p (mA) = À20 mA + 10.241 mA/ (Vs À1 ) 1/2 ; R 2 = 0.9990. This behaviour indicates that, the electrochemical oxidation of SOT is controlled by diffusion processes [40][41][42].…”

Section: Effect Of Scan Ratementioning

confidence: 76%

Incorporation of Tetrazolium Blue (TB)/Gold Nanoparticles (GNPs) into Carbon Paste Electrode: Application as an Electrochemical Sensor for the Sensitive and Selective Determination of Sotalol in Micellar Medium

et al. 2017

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The electrochemical oxidation of Sotalol (SOT) based on Tetrazolium Blue (TB)/gold nanoparticles (GNPs)‐modified carbon paste electrodes (CPE) have been studied in the presence of sodium lauryl sulphate (SLS). Cyclic voltammetry (CV), differential pulse voltammetry (DPV), chronoamperometry and electrochemical impedance spectroscopy (EIS) techniques have all been utilized within this study. GNPs and TB have a synergetic effect‐giving rise to highly improved electrochemical responses and provide an advantageous platform for the basis of an electrochemical sensor with excellent performance. The experimental parameters, electrodeposition time, pH and scan rate have all been examined and optimized. The sensing of SOT via DPV is found to exhibit a wide linear dynamic range of 1.0×10−7–7.5×10−4 M in pH 2. LOD and LOQ were calculated and found to correspond to 2.5×10−8 M and 8.3×10−8 M, respectively. The suggested sensor has been used successfully for SOT determination in pharmaceutical samples and human urine as real samples. Satisfactory recoveries of analyte from these samples are demonstrated indicating that the suggested sensor is highly suitable for clinical analysis, quality control and a routine determination of SOT in pharmaceutical formulations.

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Section: Effect Of Scan Ratementioning

confidence: 76%

Incorporation of Tetrazolium Blue (TB)/Gold Nanoparticles (GNPs) into Carbon Paste Electrode: Application as an Electrochemical Sensor for the Sensitive and Selective Determination of Sotalol in Micellar Medium

et al. 2017

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“…Electrochemical methods have the advantage of being fast, sensitive, relatively inexpensive and easy to implement [19]. To increase the sensitivity and selectivity of the working electrodes used in electrochemical methods, it is frequent to use various types of materials as electrodes modifiers [20][21][22][23][24]. Functionalized clay minerals have been widely used to modify solid electrodes applied for the electroanalysis of electroactive species.…”

Section: Introductionmentioning

confidence: 99%

Sensitive Amperometric Determination of Thiocyanates at Ionic Liquid Nanohybrid Kaolinite Modified Glassy Carbon Electrode

et al. 2018

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Electrochemical sensors have been developed by modifying a glassy carbon electrode with organo‐kaolinite hybrid materials. These materials were obtained by the grafting of four ionic liquids (1‐(2‐hydroxyethyl)‐4‐benzylpyridinium chloride, 1‐(2‐hydroxyethyl)‐4‐(tert‐butyl)pyridinium chloride, 1‐(2‐hydroxyethyl)‐4‐ethylpyridinium chloride and 1‐(2‐hydroxyethyl)‐4‐methylpyridinium chloride) on the interlayer aluminol surfaces of kaolinite. With the presence of ionic liquids in the interlayer space of kaolinite, the hybrid materials acquired anion exchange properties and were successfully applied as electrode modifier for the electroanalysis of thiocyanate (SCN−), an anion of medical and environmental concern. A pre‐concentration/detection strategy was used to overcome the interfering effect of the electrolytic solution. After the optimisation of some key experimental parameters (sodium nitrate as electrolyte, 5 min of accumulation time) calibration curves were plotted. Excellent linearity was obtained in the low concentration region (1×10−6 M to 4×10−5 M). The lowest detection limit (15 nM) was obtained with the benzylpyridinium functionalized kaolinite and the highest (60 nM) with the methylpyridinium functionalized kaolinite. Interfering anions (NO3−, Cl−, SO42− and CH3COO−) present in the pre‐concentration solution were found to interfere with SCN− but the sensors remained stable and produced reproducible signals. The most sensitive sensor was successfully applied for the amperometric determination of SCN− in human saliva samples.

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“…However, the electrochemical reactions of thiopurines at the surface of bare electrodes are characterized by very slow electron transfer kinetics. Therefore, modern researches in this area are devoted to the application of nanomaterial-based electrochemical sensors [11][12][13][14][15][16][17][18]. Among them, 2D-dimensional nanocarbon materials such as graphene (GR) and its derivatives, particularly graphene oxide (GO) and reduced graphene oxide (RGO), were proved to be promising for the fabrication of high performance electrochemical sensors for the sensitive determination of target analytes.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Sensor Based on Nanocomposite of Ionic Liquid Modified Graphene Oxide – Chitosan and its Application for Flow Injection Detection of Anticancer Thiopurine Drugs

Shpigun

Andryukhina

2018

Electroanalysis

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Electrochemical activity of carbositall electrodes (CSEs) covered with polymeric films of Chitosan (Chit) containing different types of graphene oxide (GO) dispersed in a room temperature ionic liquid (IL) was comparatively investigated by using cyclic voltammetry of [Fe(CN)6]3−/4− as a model redox probe. It was recognized that the nanocomposite film with in situ electrochemically reduced GO (ERGO) provided an improved electrochemical activity, including increased peak current and electron‐transfer efficiency, compared to the initial GO nanosheets and chemically reduced GO (RGO). The novel electrochemical sensor ERGO‐IL‐Chit/CSE showed enhanced electrochemical response characteristics towards the antimetabolic thiopurines such as 6‐thioguanine, 6‐mercaptopurine and azathioprine which play a significant role in medicinal chemistry and cancer therapy. The diagnostic characteristics of the voltammetric signals for all investigated compounds in neutral aqueous media were established and the nature of the corresponding redox‐reactions was discussed. The developed sensor was incorporated into a flow injection amperometric system for the automatic dissolution testing of thiopurine anticancer drugs with a sampling rate of 60 h−1.

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Sensing and Monitoring

Cited by 11 publications

References 78 publications

Incorporation of Tetrazolium Blue (TB)/Gold Nanoparticles (GNPs) into Carbon Paste Electrode: Application as an Electrochemical Sensor for the Sensitive and Selective Determination of Sotalol in Micellar Medium

Incorporation of Tetrazolium Blue (TB)/Gold Nanoparticles (GNPs) into Carbon Paste Electrode: Application as an Electrochemical Sensor for the Sensitive and Selective Determination of Sotalol in Micellar Medium

Sensitive Amperometric Determination of Thiocyanates at Ionic Liquid Nanohybrid Kaolinite Modified Glassy Carbon Electrode

Electrochemical Sensor Based on Nanocomposite of Ionic Liquid Modified Graphene Oxide – Chitosan and its Application for Flow Injection Detection of Anticancer Thiopurine Drugs

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