Simultaneous determination of Pb and Cd in low-cost jewelry using differential pulse voltammetry

Ferreira, Taimara Polidoro; Sousa, Rafael Arromba de; Lowinsohn, Denise

doi:10.1039/c6ay02699k

Cited by 6 publications

(4 citation statements)

References 16 publications

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“…Regarding the electrodes often integrated into BIA cells, many studies reported in the literature make use of conventional electrodes [ 27 , 29 , 33 – 35 ]. Normally, these electrodes are relatively large and bulky, making difficult their use for on-site applications [ 28 , 36 , 37 ].…”

Section: Introductionmentioning

confidence: 99%

3D-printed electrochemical platform with multi-purpose carbon black sensing electrodes

2022

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The 3D printing is described of a complete and portable system comprising a batch injection analysis (BIA) cell and an electrochemical platform with eight sensing electrodes. Both BIA and electrochemical cells were printed within 3.4 h using a multimaterial printer equipped with insulating, flexible, and conductive filaments at cost of ca. ~ U$ 1.2 per unit, and their integration was based on a threadable assembling without commercial component requirements. Printed electrodes were exposed to electrochemical/Fenton pre-treatments to improve the sensitivity. Scanning electron microscopy and electrochemical impedance spectroscopy measurements upon printed materials revealed high-fidelity 3D features (90 to 98%) and fast heterogeneous rate constants ((1.5 ± 0.1) × 10 −3 cm s −1 ). Operational parameters of BIA cell were optimized using a redox probe composed of [Fe(CN) 6 ] 4−/3− under stirring and the best analytical performance was achieved using a dispensing rate of 9.0 µL s −1 and an injection volume of 2.0 µL. The proof of concept of the printed device for bioanalytical applications was evaluated using adrenaline (ADR) as target analyte and its redox activities were carefully evaluated through different voltammetric techniques upon multiple 3D-printed electrodes. The coupling of BIA system with amperometric detection ensured fast responses with well-defined peak width related to the oxidation of ADR applying a potential of 0.4 V vs Ag. The fully 3D-printed system provided suitable analytical performance in terms of repeatability and reproducibility (RSD ≤ 6%), linear concentration range (5 to 40 µmol L −1 ; R 2 = 0.99), limit of detection (0.61 µmol L −1 ), and high analytical frequency (494 ± 13 h −1 ). Lastly, artificial urine samples were spiked with ADR solutions at three different concentration levels and the obtained recovery values ranged from 87 to 118%, thus demonstrating potentiality for biological fluid analysis. Based on the analytical performance, the complete device fully printed through additive manufacturing technology emerges as powerful, inexpensive, and portable tool for electroanalytical applications involving biologically relevant compounds. Graphical abstract Supplementary Information The online version contains supplementary material available at 10.1007/s00604-022-05323-4.

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Section: Introductionmentioning

confidence: 99%

3D-printed electrochemical platform with multi-purpose carbon black sensing electrodes

2022

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“…A escassez de estudos com bijuterias de baixo custo importadas sugere a importância da pesquisa e a necessidade de expansão das investigações científicas em nosso país. 37,38 Considerando a enorme extensão territorial do Brasil e que bijuterias contaminadas podem estar espalhadas por todo o país, a responsabilidade pelo controle e fiscalização é das autoridades competentes, mas a ciência também tem seu papel nesse processo, e tem real importância quando está incumbida com assuntos que dizem respeito aos aspectos sociais, econômicos, éticos e ambientais que permeiam a sociedade.…”

Section: Estado Da Arteunclassified

Determinação De Cádmio Em Bijuterias Oriundas Da China

Pais¹,

Dina²,

Alves³

et al. 2018

Quim. Nova

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“…Additionally, some problems related to the multiple stripping peaks would arise when using solid electrodes, possibly due to the interactions between co-deposited metals and/or underpotential/bulk deposition of the target metals. Substantial efforts have been exerted to investigate multiple peaks in the simultaneous detection of copper and lead on glassy carbon, graphite and boron-doped diamond electrodes [5,[9][10][11][12]. However, these composite materials have advantages such as fast preparation and low cost and have thus been applied to lead analysis [13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Electrochemical determination of lead(II) ions in hot spring water based on a multi-walled carbon nanotube-modified glassy carbon electrode

Li¹,

Economics²

2018

International Journal of Electrochemical Science

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The present study reports the fabrication of a carbon nanotube/Nafion composite film (MWNT/Nafion)-modified glassy carbon electrode (GCE) along with its excellent performance in the analysis of Pb 2+ (favorable catalytic activity, large surface area, high cation exchange capacity, and strong adsorption ability). The stripping peak current of Pb 2+ was greatly increased at the MWNT/Nafion-coated GCE compared with the bare and Nafion-coated GCEs. The optimization of different parameters was also carried out, including optimization of the accumulation time, accumulation potential, supporting electrolyte, and MWNT/Nafion suspension volume. Therefore, our developed electrode can be used in the analysis of Pb 2+ in real hot spring water samples.

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Simultaneous determination of Pb and Cd in low-cost jewelry using differential pulse voltammetry

Abstract: The simultaneous electrochemical determination of lead (Pb) and cadmium (Cd) in low-cost jewelry was achieved using differential pulse voltammetry (DPV).

Cited by 6 publications

References 16 publications

3D-printed electrochemical platform with multi-purpose carbon black sensing electrodes

3D-printed electrochemical platform with multi-purpose carbon black sensing electrodes

Determinação De Cádmio Em Bijuterias Oriundas Da China

Electrochemical determination of lead(II) ions in hot spring water based on a multi-walled carbon nanotube-modified glassy carbon electrode

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