Preparation of a carbon ceramic electrode modified by 4-(2-pyridylazo)-resorcinol for determination of trace amounts of silver

Rohani, Tahereh; Taher, Mohammad Ali

doi:10.1016/j.talanta.2009.10.029

Cited by 22 publications

(6 citation statements)

References 43 publications

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“…In their work, chlorine in the form of 12.5 mM KCl was added as an electrolyte reagent to test solutions to improve the signal results for ASV. Other authors have also reported chlorine additions, e.g, using 0.1 M HCl as an electrolyte for the optimisation of silver detection [16,31]. In this work, chlorine was naturally present in tap water thus, no additional reagent had to be added to enhance silver detection in tap water as chlorine remains the most commonly used water disinfectant worldwide [32].…”

Section: In Situ Ph Control: Tap Watermentioning

confidence: 87%

Reagent free electrochemical-based detection of silver ions at interdigitated microelectrodes using in-situ pH control

Wasiewska

Seymour

Patella

et al. 2021

Sensors and Actuators B: Chemical

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Silver ions, the most toxic form of silver, can be present in drinking water due to their release from silver nanoparticles which are widely used in consumer products. Due to their adverse health effects, a quick portable approach for detection in drinking water is needed. Herein we report on the development of an electrochemical sensor for silver ions detection in tap water using linear sweep voltammetry with in situ pH control; enabled by closely space interdigitated electrode arrays. The in situ pH control approach, allows the pH of a test solution to be tailored to pH 3 thereby eliminating the current need for acid addition. A calibration curve between 0.2 -10 µM was established for silver detection in sodium acetate when 1.25 V and 1.65 V was applied at the protonator electrode during deposition and stripping, respectively, as a proof of concept study. For the final application in tap water, 1.65 V was applied at the protonator electrode during deposition and stripping. The chlorine ions, present in tap water as a consequence of the disinfection process, facilitated the silver detection and no additional electrolyte had to be added. Combination of complexation of silver ions with chlorine coupled with in situ pH control resulted in linear calibration range between 0.25 and 2 µM in tap water without the need of acidification.

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Section: In Situ Ph Control: Tap Watermentioning

confidence: 87%

Reagent free electrochemical-based detection of silver ions at interdigitated microelectrodes using in-situ pH control

Wasiewska

Seymour

Patella

et al. 2021

Sensors and Actuators B: Chemical

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“…A number of analytical characteristics of the NBHAE-MCPE were compared with those previously reported for Ag(I) voltammetric sensors. 23,25,26,29,31,[34][35][36][37][38][39] The results are summarized in Table 4. As can be seen, the NBHAE-MCPE electrode shows better analytical characteristics, such as a lower detection limit and wider linear except, than previous reports.…”

Section: Comparison Of Nbhae-mcpe With Previously Reported Modified E...mentioning

confidence: 99%

“…As can be seen, the NBHAE-MCPE electrode shows better analytical characteristics, such as a lower detection limit and wider linear except, than previous reports. 23,37,38…”

Section: Comparison Of Nbhae-mcpe With Previously Reported Modified E...mentioning

confidence: 99%

Fabrication of a new multi-walled carbon nanotube paste electrode for stripping voltammetric determination of Ag(i)

Nadiki

Taher

Ashkenani

et al. 2012

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A new modified carbon paste electrode based on multi-walled carbon nanotubes and a synthesized Schiff base of N,N'-bis(2-hydroxybenzylidene)-2,2'(aminophenylthio) ethane, acting as a chelating agent for Ag(I) ions, is described. The electroanalytical procedure for the determination of Ag(I) was comprised of two steps: the chemical accumulation of the analyte under open-circuit conditions followed by replacing the medium with a 0.1 M HCl solution where the accumulated Ag(I) was reduced for 20 s in -0.7 V. The potential was then scanned from -0.2 to +0.2 V to obtain the voltammetric peak. The effective parameters in the sensor response were examined. Under optimized operational conditions, a linear response range from 0.5-200 ng mL(-1) was obtained. The detection limit for silver determination was 0.092 ng mL(-1). For 7 successive determinations of 15.0 and 60.0 ng mL(-1) of Ag(I), relative standard deviations of 2.2% and 1.2% were obtained, respectively. The procedure was applied in determining Ag(I) in X-ray photographic films and water samples.

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“…Moreover, silver alloys and compounds are widely utilized in pharmaceutical/dental preparations and in implanted prostheses owing to their well-known antibacterial nature. 1,2 Besides, silver is extensively applied in imaging and photographic applications. 1,2 The wide utilization of silver compounds and silver containing procedures in industry has led to the increase of silver in environmental samples.…”

Section: Introductionmentioning

confidence: 99%

“…1,2 Besides, silver is extensively applied in imaging and photographic applications. 1,2 The wide utilization of silver compounds and silver containing procedures in industry has led to the increase of silver in environmental samples. 2,3 Silver can enter into the environmental samples via industrial discharges owing to the fact that it oen occurs as an impurity in Cu, Sb, As and Zn ores.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of a novel magnetic metal–organic framework functionalized with 2-aminothiophenol for preconcentration of trace silver amounts in water and wastewater

2021

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Preparation of a carbon ceramic electrode modified by 4-(2-pyridylazo)-resorcinol for determination of trace amounts of silver

Cited by 22 publications

References 43 publications

Reagent free electrochemical-based detection of silver ions at interdigitated microelectrodes using in-situ pH control

Reagent free electrochemical-based detection of silver ions at interdigitated microelectrodes using in-situ pH control

Fabrication of a new multi-walled carbon nanotube paste electrode for stripping voltammetric determination of Ag(i)

Fabrication of a novel magnetic metal–organic framework functionalized with 2-aminothiophenol for preconcentration of trace silver amounts in water and wastewater

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