Direct determination of cadmium and lead in pharmaceutical ingredients using anodic stripping voltammetry in aqueous and DMSO/water solutions

Rosolina, Samuel M.; Chambers, James Q.; Lee, Carlos W.; Chen, Xue-Tai

doi:10.1016/j.aca.2015.07.010

Cited by 59 publications

(16 citation statements)

References 63 publications

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“…Therefore, the detection of Pb 2+ ion is encouraging with various new technologies in the environment particularly in portable water and food to protect the public health from the toxicity of lead. Many methods such as electrochemical techniques, biochemical, anodicstripping voltammetry, colorimetric, atomicabsorption spectroscopy (AAS), surface‐enhanced Raman spectroscopy and plasma atomic emission spectroscopy already have been established to confirm detection of a lead cation . Except for the electrochemical method, these are expensive with heady and costly equipment, time‐consuming and need sample pretreatment.…”

Section: Introductionmentioning

confidence: 99%

Selective Fabrication of an Electrochemical Sensor for Pb²⁺ Based on Poly(pyrrole‐co‐o–toluidine)/CoFe₂O₄ Nanocomposites

et al. 2019

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We report the synthesis of a novel nanocomposites based Poly (pyrrole-co-o-toluidine) copolymer and cobalt ferrite (CoFe 2 O 4 ) as an electrochemical sensor for selective Pb 2 + detection. The general abbreviation of these new materials are given as P(Pyco-OT)/CF nanocomposites (P(Py-co-OT)/CF NCs). The synthesis was performed via in situ-chemical oxidative polymerization method at different CoFe 2 O 4 weight ratio (5%, 10%, 30%, 50% and 70%), whereas CoFe 2 O 4 nanoparticle (NPs) was synthesized by an egg white method prior the nanocomposite formation. The structural, morphological, thermal, magnetic, electrical and electrochemical properties of pure P(Py-co-OT), CoFe 2 O 4 and P (Py-co-OT)/CF NCs were characterized by XRD, FTIR, TGA-DTG, SEM-EDX, TEM, VSM and electrical conductivity. The results of XRD and FTIR confirmed the formation of P(Py-co-OT)/CF NCs with the component CoFe 2 O 4 showing spinel structure. The analysis of TGA-DTG presented that CoFe 2 O 4 NPs improved the thermal stability of NCs indicated the presence of some interactions between the interface of P(Py-co-OT) and CoFe 2 O 4NPs, which affects the chemical and physical properties of the NCs. The ac conductivity was also examined as a function of temperature. The measures showed a decrease in the conductivity of NCs when increasing the insulating CoFe 2 O 4 NPs contents. A cost-effective and reliable electrochemical sensor selective to Pb 2 + ion was fabricated using P(Py-co-OT)/CF NCs on glassy carbon (GCE). It was found that the P(Py-co-OT)/CF 10 NCs exhibit excellent detection of Pb 2 + ion. The proposed Pb 2 + ion sensor was performed linearly over the large concentration range of 0.1 nM ∼ 0.01 mM labelled as linear dynamic range (LDR). The sensitivity as well as detection limit were estimated to be 22.39 μAμM À 1 cm À 2 and 42.39 � 2.12 pM, respectively. The desired ionic sensor-based on P(Py-co-OT)/CF 10 NCs/binder/GCE was found as efficient to detect Pb 2 + ion in environmental and biological samples significantly. The analytical sensor performances such as reproducibility, sensitivity, stability, validation, and response time were reliable and significant.

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Section: Introductionmentioning

confidence: 99%

Selective Fabrication of an Electrochemical Sensor for Pb²⁺ Based on Poly(pyrrole‐co‐o–toluidine)/CoFe₂O₄ Nanocomposites

et al. 2019

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“…Carbon materials (CMs) were widely used as electrode for ASV because it possesses certain attractive features such as wide potential window, catalytic activity, higher complexation capacity with metals and also because gold and silver electrodes are not suitable for simultaneous ASV . Therefore, various carbon materials such as glassy carbon, pyrolytic graphite, pencil lead, carbon nanotube, graphene, nitrogen doped diamond, boron doped diamond, composite etc. were used as working electrode in the stripping voltammetry of heavy metals.…”

Section: Introductionmentioning

confidence: 99%

A Cost‐Effective, Unmodified Platform for the Detection of Heavy Metals via Anodic Stripping Voltammetry at Nanomolar Level

Perween

Srivastava

2017

ChemistrySelect

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A new carbon based cost‐effective platform for stripping voltammetry has been reported. A Flat, self‐standing polymer composite chip electrode, having less than 500 micron thickness, has been developed using graphite and poly (methyl methacrylate) in 3:2 ratio. The dimensions and physical state of the chip is best suited for off‐laboratory applications. The utilization of such chip in detection of mercury, lead and cadmium by anodic stripping voltammetry has been tried individually as well as simultaneously over as‐prepared electrode without any modification. Under optimized conditions, limit of detection was found to be 200, 60, 350 nM (40, 15, 40 ppb) in individual analysis, whereas 250, 130, 400 nM (50, 25, 50 ppb) in simultaneous analysis for Hg (II), Pb (II) and Cd (II) ions respectively. The protocol has been extended for the estimation of aforesaid ions in the natural water samples.

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“…Es por esta razón que en pocas universidades e institutos de investigación colombianos se cuantifican estos plaguicidas y, en consecuencia, no se encuentran muchos estudios en el país relacionados con dichos compuestos. La electroquímica es una opción para el análisis de trazas de metales pesados, aniones, sulfuros, nitritos, nitratos y otros compuestos orgánicos en aguas, alimentos y productos químicos, puesto [275][276][277][278][279][280][281][282][283][284] que es un ensayo no destructivo, de fácil operatividad y puede alcanzar una mayor sensibilidad (Jakumnee et al 2001;Segura 2003;Rosolina et al 2015). Además, debido a la reducción de reactivos y, por ende, de residuos (que pueden ser tratados con relativa facilidad) es una técnica amigable con el medioambiente.…”

Section: Introductionunclassified

Cuantificación voltamétrica de carbofurano en papa (Solanum tuberosum L., Solanaceae)

Lara-Sandoval

Acuña

2017

Corpoica Cienc. Tecnol. Agropecuaria

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Sanidad vegetal y protección de cultivosCuantificación voltamétrica de carbofurano en papa (Solanum tuberosum L., Solanaceae)Voltammetric quantification of Carbofuran in potato (Solanum tuberosum L., Solanaceae)Quantificação voltamétrica de carbofurano em batata (Solanum tuberosum L., Solanaceae) Artículo de investigación científica y tecnológicaAdriana Elizabeth Lara-Sandoval,1 Sandra Patricia Chaparro-Acuña2 ResumenEl exceso en la aplicación de plaguicidas puede generar acumulaciones en los tubérculos de papa que sobrepasen el límite máximo residual (LMR) presentado por el Codex Alimentarius, lo cual representa riesgos para la salud de los consumidores. La cuantificación de plaguicidas es un proceso costoso y de difícil acceso para los cultivadores y entes de salud y de vigilancia. En este artículo se presenta una metodología sencilla, económica y asequible para la cuantificación de carbofurano en tubérculos. El método de voltametría diferencial de pulso (DPV) para carbofurano fue validado para su cuantificación en papa. El estudio fue realizado usando como electrolito de soporte la solución bufferPalabras clave: electroquímica, insecticidas, productos agrícolas, Solanum tuberosum Britton-Robinson, un electrodo de trabajo de carbón vítreo, Ag/AgCl como electrodo de referencia y platino como electrodo auxiliar. El insecticida en papa fue extraído por reparto sólido-líquido y los resultados obtenidos fueron contrastados por espectroscopía UV-Vis, lo cual permitió deducir que el método voltamétrico genera resultados satisfactorios, precisos y confiables para la cuantificación de carbofurano en muestras de este tubérculo. Estos resultados son una evidencia del uso de carbofurano en el municipio de Ventaquemada (Boyacá). Este método de detección de carbofurano puede utilizarse como una herramienta para monitorear el uso de estos compuestos químicos en la papa. 275-284

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Direct determination of cadmium and lead in pharmaceutical ingredients using anodic stripping voltammetry in aqueous and DMSO/water solutions

Cited by 59 publications

References 63 publications

Selective Fabrication of an Electrochemical Sensor for Pb²⁺ Based on Poly(pyrrole‐co‐o–toluidine)/CoFe₂O₄ Nanocomposites

Selective Fabrication of an Electrochemical Sensor for Pb²⁺ Based on Poly(pyrrole‐co‐o–toluidine)/CoFe₂O₄ Nanocomposites

A Cost‐Effective, Unmodified Platform for the Detection of Heavy Metals via Anodic Stripping Voltammetry at Nanomolar Level

Cuantificación voltamétrica de carbofurano en papa (Solanum tuberosum L., Solanaceae)

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Direct determination of cadmium and lead in pharmaceutical ingredients using anodic stripping voltammetry in aqueous and DMSO/water solutions

Cited by 59 publications

References 63 publications

Selective Fabrication of an Electrochemical Sensor for Pb2+ Based on Poly(pyrrole‐co‐o–toluidine)/CoFe2O4 Nanocomposites

Selective Fabrication of an Electrochemical Sensor for Pb2+ Based on Poly(pyrrole‐co‐o–toluidine)/CoFe2O4 Nanocomposites

A Cost‐Effective, Unmodified Platform for the Detection of Heavy Metals via Anodic Stripping Voltammetry at Nanomolar Level

Cuantificación voltamétrica de carbofurano en papa (Solanum tuberosum L., Solanaceae)

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Selective Fabrication of an Electrochemical Sensor for Pb²⁺ Based on Poly(pyrrole‐co‐o–toluidine)/CoFe₂O₄ Nanocomposites

Selective Fabrication of an Electrochemical Sensor for Pb²⁺ Based on Poly(pyrrole‐co‐o–toluidine)/CoFe₂O₄ Nanocomposites