Simultaneous determination of zinc, cadmium and lead in environmental water samples by potentiometric stripping analysis (PSA) using multiwalled carbon nanotube electrode

Tarley, César Ricardo Teixeira; Santos, Virgínia Souza; Baêta, Bruno Eduardo Lôbo; Pereira, Arnaldo César; Kubota, Lauro T.

doi:10.1016/j.jhazmat.2009.03.077

Cited by 96 publications

(31 citation statements)

References 28 publications

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“…The standard additions of 20 and 40 μg L −1 were employed as well to evaluate the accuracy of the new method. According to the results shown in Table II, the original concentration Table II of Cd(II) in the river samples was tested to be 0.42 ± 0.01 μg L −1 , much lower than the officially allowed level, 44 which was in good accordance with the data from ICP-MS. It was therefore concluded that the river water where it was collected was not severely contaminated by Cd(II).…”

Section: Analytical Performance Of Sn-pb/mpc/gce Toward Cd(ii)supporting

confidence: 70%

Sn-Pb Hybrid Nanoparticle Decorated Mesoporous Carbon for Sensitive Stripping Detection of Cd (II)

Ouyang

Zhou

et al. 2014

J. Electrochem. Soc.

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Novel Sn-Pb hybrid nanoparticle decorated mesoporous carbon (MPC) was successfully prepared on a glassy carbon electrode (GCE) and used for the anodic stripping measurements of Cd(II) via square wave Voltammetry. In the presence of MPC, the properties of Sn-Pb were dramatically improved including the ability of electron transfer, particle size and hydrophilicity, which played a significant role in achieving more preferable analytical performances of Cd(II) with Sn-Pb based sensor. After all the experimental parameters involved were carefully optimized, the proposed Sn-Pb/MPC based sensor was applied to the stripping determination of Cd(II), showing the best electrochemical behaviors by comparison with Sn, Pb and Sn-Pb modified electrodes. The synergic effect between Sn-Pb and MPC was believed to be the major factor leading to such improved electrochemical properties of Sn-Pb/MPC based sensor for Cd(II) analysis. In the concentration range of 0-140 μg L −1 , the linear analytical curve for Cd(II) was achieved with correlation coefficient and detection limit calculated to be 0.9996 and 0.36 μg L −1 (S/N = 3), respectively. By using the standard addition method, Cd(II) ion in river samples was successfully determined with satisfactory recoveries higher than 100%. These results suggest that the proposed method can be applied as a simple, efficient alternative to monitor the heavy metals in water samples, compared with ICP based techniques.

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Section: Analytical Performance Of Sn-pb/mpc/gce Toward Cd(ii)supporting

confidence: 70%

Sn-Pb Hybrid Nanoparticle Decorated Mesoporous Carbon for Sensitive Stripping Detection of Cd (II)

Ouyang

Zhou

et al. 2014

J. Electrochem. Soc.

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“…A detection limit of 0.04 lg/L was achieved under optimum conditions. In another study, Tarley et al [75] used a CNT-modified electrode for simultaneous detection of zinc, cadmium, and lead. Using potentiometric stripping analysis rather than anodic stripping analysis resulted in low limits of detection of 28.0, 8.4, and 6.6 lg/L for zinc, cadmium and lead, respectively, despite the high background currents of the CNT.…”

Section: As-grown Cnt-based Electrodesmentioning

confidence: 99%

Carbon nanotube-based extraction and electrochemical detection of heavy metals

2011

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In this mini review, recent trends and challenges in developing carbon nanotube-based extraction and electrochemical detection of heavy metals in water are reviewed. Carbon nanotubes (CNT) have electrical, mechanical, chemical, and structural properties superior to those of conventional materials, for example graphite and activated carbon. CNT-based procedures are also more efficient than traditional techniques and methods, for example liquid-liquid extraction, atomicabsorption spectroscopy, flame photometry, and inductively coupled plasma, because they can enable rapid, sensitive, simple, and low-cost on-site detection. Different forms of CNT, including as-grown, oxidised, and functionalised CNT, can be well suited to metal adsorption. The measurement procedure relies on adsorbing the metal on the CNT surface after reasonable contact time, either by applying an electrical potential or under open-circuit conditions, and subsequent quantification. Different types of CNT-based electrode, including composite, paste, and binderfree, can be fabricated and used for metal detection. Application of CNT and their novel properties to the adsorption and detection of heavy metals is discussed in detail.

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“…Modification of these electrodes with nanomaterials are of great interest because of their unique properties [3,5,9,10]. The added nanomaterials can act as conducting centers thereby promoting electron transfer [11].…”

Section: Introductionmentioning

confidence: 99%

Artificial Neural Network Optimization of a Carbon Paste Electrode for the Detection of Zinc Ions

Isaac¹,

Prabhakaran²

2016

Nano BioMed ENG

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The present work focuses on the fabrication of a potentiometric sensor for the determination of zinc ions using 3,7,12,17-Tetramethyl-8,13-divinyl-2,18-porphinedipropionic acid disodium salt (protoporphyrin IX disodium) as the ionophore. The electrode is fabricated by various composition of protoporphyrin IX disodium, graphite, multiwalled carbon nanotube, paraffin oil, and sodium tetraphenyl borate. These factors are varied at 5 levels. The composition of the electrode is optimized using artificial neural network. The optimization of electrode composition was carried out using genetic algorithm, rotation inherit optimization and particle swarm optimization techniques. The genetic algorithm (GA) optimized electrode was prepared with the composition ionophore (9.71 mg), paraffin oil (drop) (7.17), NaTPB (5.31 mg), graphite (244.82 mg) and MWCNT (21.82 mg) showed better response with a a Nernstian slope of 29.69 mV/decade. It also showed a linear response in the concentration range of 1.0×10 −1 M to 3.09×10 −7 M and a detection limit of 1.9×10 −7 M. The electrode showed a good selectivity for Zn 2+ relative to many studied cations. The GA optimized electrodes showed a stable response in the pH range of 2.7 to 7.0w with a response time less than 20 s for all the tested concentration ranges. Analytical application of the electrode was demonstrated by using the prepared electrode as an indicator electrode for the potentiometric titration of Zn 2+ against EDTA.

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Simultaneous determination of zinc, cadmium and lead in environmental water samples by potentiometric stripping analysis (PSA) using multiwalled carbon nanotube electrode

Cited by 96 publications

References 28 publications

Sn-Pb Hybrid Nanoparticle Decorated Mesoporous Carbon for Sensitive Stripping Detection of Cd (II)

Sn-Pb Hybrid Nanoparticle Decorated Mesoporous Carbon for Sensitive Stripping Detection of Cd (II)

Carbon nanotube-based extraction and electrochemical detection of heavy metals

Artificial Neural Network Optimization of a Carbon Paste Electrode for the Detection of Zinc Ions

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