Thiocyanate ion selective electrode based on bis(N-3-methylphenyl salicylidenaminato)copper(II) ionophore

Benvidi, Ali; Ghanbarzadeh, Mahsa; Dehghan, Mahdieh; Mazloum-Ardakani, Mohammad; Vafazadeh, Rasoul

doi:10.1016/j.cclet.2014.06.020

Cited by 21 publications

(11 citation statements)

References 24 publications

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“…Recently Schiff base complexes have attracted much notice and have many applications in electrochemistry . The purpose of this work is preparation and study of the electrochemical properties of CPE/RGO modified with bis(salicylaldehyde)‐nickel(II)‐dihydrate complex (Ni(II)‐BS).…”

Section: Introductionmentioning

confidence: 99%

“…In the mentioned researches, modified electrodes showed a significantly higher response for methanol oxidation that followed by a decrease in the corresponding cathodic current in the presence of methanol. Following our previous works , in the present work the combination of reduced graphene oxide (RGO) and Ni(II)‐BS at the carbon paste electrode which named Ni(II)‐BS/RGO/CPE was used for determination of methanol in industrial ethanol containing methanol. The modified carbon paste electrode with nano sheets of RGO and Ni(II)‐BS complex as a modifier, possesses some benefits such as providing a suitable base for oxidation of methanol at the electrode surface.…”

Section: Introductionmentioning

confidence: 99%

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Investigation of Electrochemical Oxidation of Methanol at a Carbon Paste Electrode Modified with Ni(II)‐BS Complex and Reduced Graphene Oxide Nano Sheets

et al. 2016

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In the present research, the electro oxidation of methanol was investigated by different electrochemical methods at a carbon paste electrode (CPE) modified with bis(salicylaldehyde)‐nickel(II)‐dihydrate complex (Ni(II)‐BS) and reduced graphene oxide (RGO) (which named Ni(II)‐BS/RGO/CPE) in an alkaline solution. This modified electrode showed very efficient activity for oxidation of methanol. It was found that methanol was oxidized by NiOOH groups generated by further electrochemical oxidation of nickel (II) hydroxide on the surface of the modified electrode. The rate constant and electron transfer coefficient were calculated to be 2.18 s−1 and 0.4, respectively. The anodic peak currents revealed a linear dependency with the square root of scan rate. This behaviour is the characteristic of a diffusion controlled process, so the diffusion coefficient of methanol was found to be 1.16×10−5 cm2 s−1 and the number of transferred electron was calculated to be 1. Moreover, differential pulse voltammetry (DPV) investigations showed that the peak current values were proportional to the concentration of methanol in two linear ranges. The obtained linear ranges were from 0.5 to 100.0 µM (R2=0.991) and 400.0 to 1300.0 µM (R2=0.992), and the detection limit was found to be 0.19 µM for methanol determination. Generally, the Ni(II)‐BS/RGO/CPE sensor was used for determination of methanol in an industrial ethanol solution containing 4.0 % methanol.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Investigation of Electrochemical Oxidation of Methanol at a Carbon Paste Electrode Modified with Ni(II)‐BS Complex and Reduced Graphene Oxide Nano Sheets

et al. 2016

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“…(12) There are many reported works on the detection of thiocyanate using different ionophores as the active material. Recently, (N-3-methyl phenyl salicylidenaminato)-copper(II), (13) 2'-[(4,5dimethyl-1,2-phenylene) bis[(E)-nitrilomethylidyne]] bis [4,6-bis (1,1-dimethylethyl) with Mn(III)-salophen chloride], (14) and sulfadimidine metal complexes (15) were utilized as ionophores in sensors for the detection of thiocyanate. The main composition of ISEs normally consists of an electrode and ion-selective membranes (ISMs), which consist of ionophores, additives, monomers, and plasticizers.…”

Section: Introductionmentioning

confidence: 99%

Self-plasticizing Membrane Based on Co(II)-porphyrin Modified with Silver Nanoparticles for Thiocyanate Detection

Zainal¹,

Rezayi²,

Alias³

et al. 2019

Sensors and Materials

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A novel potentiometric anion-selective self-plasticizing polymeric membrane based on 5,10,15,20-tetrakis-(4-methoxyphenyl)-21H,23H-porphyrin cobalt(II) (CoTMeOPP)-silvernanoparticle-modified glassy carbon electrode (GCE) was examined for use in the detection of thiocyanate anions. The membrane was characterized by X-ray diffraction (XRD) analysis, field-emission electron microscopy, UV-visible diffused ref lectance spectroscopy, and fluorescence spectroscopy. The prepared ion-selective sensor exhibited a positive Nernstian response and deviated from the classical Hofmeister selective pattern with a significantly sensitive and enhanced response towards the thiocyanate anion. It exhibited a rapid response of 3 s with a low detection limit of 9.55 × 10 −8 M within the concentration range from 1 × 10 −1 to 1 × 10 −7 M. The sensor also showed a high selectivity for the thiocyanate anion over a variety of anions. The influence of the additives was studied and this sensor was successfully applied to the potentiometric titration of silver nitrate and the direct determination of the amount of thiocyanate anions in a wide array of samples of river water, ex-mine lake sediment, human saliva, and fish.

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“…The detection at trace level of thiocyanate (SCN − ) in biological fluids, water and industrial effluents is of great interest. Thiocyanate ions are naturally present in the human body, resulting from foods (milk, cheese and some vegetables) digestion . Since cyanide metabolism also produce SCN − , the concentration of SCN − in biological fluids such as saliva, urine and blood serum is a good indicator of cyanide's intoxication and can be used as fast method to distinguish smokers from non‐smokers .…”

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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Thiocyanate ion selective electrode based on bis(N-3-methylphenyl salicylidenaminato)copper(II) ionophore

Cited by 21 publications

References 24 publications

Investigation of Electrochemical Oxidation of Methanol at a Carbon Paste Electrode Modified with Ni(II)‐BS Complex and Reduced Graphene Oxide Nano Sheets

Investigation of Electrochemical Oxidation of Methanol at a Carbon Paste Electrode Modified with Ni(II)‐BS Complex and Reduced Graphene Oxide Nano Sheets

Self-plasticizing Membrane Based on Co(II)-porphyrin Modified with Silver Nanoparticles for Thiocyanate Detection

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

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