Highly sensitive and selective electrochemical sensor for the trace level detection of mercury and cadmium

Shah, Afzal; Sultan, Sundus; Zahid, Anum; Aftab, Saima; Nisar, Jan; Nayab, Saira; Qureshi, Rumana; Khan, Gul N.; Hussain, Hidayat; Özkan, Síbel A.

doi:10.1016/j.electacta.2017.12.002

Cited by 49 publications

(25 citation statements)

References 34 publications

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“…During the voltage scanning range (from –1.1 V to 0.5 V), obvious oxidation peaks occur around a potential of 224 mV. This is probably due to the presence of Hg 2+ , according to the reported results in the literature [26,40].…”

Section: Resultssupporting

confidence: 69%

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Cadmium-Sensitive Measurement Using a Nano-Copper-Enhanced Carbon Fiber Electrode

Xian

et al. 2019

Sensors

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Enrichment of cadmium ion (Cd2+) from the environment may lead to kidney disease and weakened immunity in the body. Current techniques are not convenient enough to measure Cd2+ concentration in the environment due to low sensitivity and poor linear range. In this paper, a new measurement technique is proposed using a new sensing electrode made of nano-copper-enhanced carbon fiber. Nano-copper was deposited onto the surface of carbon fiber to enhance the current concentration and mass transfer rate of Cd2+ during measurement, which improved the electrochemical detection sensitivity significantly (by up to 3.7 × 108 nA/nM) and broadened the linear range to 10~105 nM. This device provides a low-cost solution for measuring Cd2+ concentration in the environment.

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Section: Resultssupporting

confidence: 69%

“…The anode current with different depositing times were recorded and plotted in Figure 1B, which showed that the anode current decreased from 150 μA to 20 μA at the end of each group. This indicates that the resistance decreased during the process of electrodeposition due to the accumulation of free electrons [26].…”

Section: Resultsmentioning

confidence: 99%

Cadmium-Sensitive Measurement Using a Nano-Copper-Enhanced Carbon Fiber Electrode

Xian

et al. 2019

Sensors

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“…Kelompok logam berat adalah salah satu yang paling dipantau, karena menghasilkan efek yang jelas merusak lingkungan dan kesehatan manusia serta bioakumulasi melalui rantai makanan [1,2]. Logam berat banyak dijumpai pada air minum, udara, dan particular organisme hidup, baik dalam bentuk elemen maupun kompleks [3]. Sifat 122 logam berat yaitu sulit didegrasi, sehingga mudah terakumulasi dalam lingkungan dan keberadaannya secara alami sulit terurai (dihilangkan) [4,5].…”

Section: Pendahuluanunclassified

Fabrikasi dan Karakterisasi Sensor Elektrokimia untuk Mendeteksi Kadmium Berbasis Teknologi Film Tebal

Wahyuni

Robert

Arifin

2020

Indonesian J. Electron. Instrum. Syst.

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Electrochemical sensor has been fabrication and characterization electrode to detect heavy metals of cadmium with thick film technology. Fabrication electrodes electrochemical sensors start with the design stage of electrodes, screen maker, screen printing, and substrate cutting. The fabrication process produces a ten-pieces of sensors to be used to sensors characterization of SEM, XRD, and Cyclic Voltammetry (CV). The process of characterization produces morphology and the structure of the composites N/IL/G, and linieritas 0,9623, precision ranges between 4,11 and 10,35%, sensitivity of 0,04112 µA.L-1/mg.mm2, limit detection 0,18 mg/L, and accuracy between 79,5 and 126,8%.

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“…The strong hazardous effects of Hg 2+ ions on the living beings, prompted the scientific community to develop cost effective, selective and effective analytical tools for the detection of very trace amount of Hg 2+ ions (ppm to ppt levels) in the aqueous environment. Numerous sensing methods have been developed so far for the detection of Hg 2+ ion which are fluorescence sensing, colorimetric sensing, and electrochemical sensing . Among them electrochemical sensors are mostly effective due to their high sensitivity, cost effective and rapid response.…”

Section: Introductionmentioning

confidence: 99%

“Novel Dextrin‐Cysteine Schiff Base: A Highly Efficient Sensor for Mercury Ions in Aqueous Environment”

et al. 2020

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We report a highly sensitive electrochemical and fluorescence sensor for the detection of toxic environmental pollutant Hg2+ ions by using a novel dextrin‐cysteine‐Schiff base (DCS). The sensor is developed by the periodate oxidation of dextrin followed by Schiff base formation with an amino acid, cysteine. The new characterized DCS is used as an efficient and selective sensor for the detection of Hg2+ ions in aqueous solution both by electrochemical and fluorescence quenching process. The detection limit (LOD) by the electrochemical method is 0.74 nM which is much lower than that by the fluorometric detection, where LOD value is found to be 40.93 μM. The Schiff base/glassy carbon electrode (DCS/GCE) shows an excellent selectivity towards Hg2+ ions compare to other environmentally relevant ions where almost nil current response is observed. The DCS/GCE also exhibits remarkable sensing of Hg2+ in real water samples such as river and tap water. The electrochemical sensing of Hg2+ by DCS is found to be superior to that of fluorescence sensing.

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Highly sensitive and selective electrochemical sensor for the trace level detection of mercury and cadmium

Cited by 49 publications

References 34 publications

Cadmium-Sensitive Measurement Using a Nano-Copper-Enhanced Carbon Fiber Electrode

Cadmium-Sensitive Measurement Using a Nano-Copper-Enhanced Carbon Fiber Electrode

Fabrikasi dan Karakterisasi Sensor Elektrokimia untuk Mendeteksi Kadmium Berbasis Teknologi Film Tebal

“Novel Dextrin‐Cysteine Schiff Base: A Highly Efficient Sensor for Mercury Ions in Aqueous Environment”

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