Mercury nanodroplets supported at biochar for electrochemical determination of zinc ions using a carbon paste electrode

Oliveira, Paulo Roberto de; Lamy-Mendes, Alyne; Gogola, Jeferson L.; Mangrich, Antônio S.; Marcolino‐Júnior, Luiz H.; Bergamini, Márcio F.

doi:10.1016/j.electacta.2014.11.057

Cited by 52 publications

(18 citation statements)

References 22 publications

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“…A chemically modified CPE is obtained by the simple addition of the chemical modifier to the mixture between graphite powder and the binder agent. Several chemical modifiers have been used such as ion exchange materials, 6,7 silica, and organofunctionalized silicas, [8][9][10][11] metallic nanoparticles, 12,13 oxides 14 and complexes, 15,16 carbon nanotubes, 17 etc. These materials have allowed the preparation of CPEs with superior analytical performance extending their application to trace analysis of different kinds of analytes, such as metal ions, 18,19 drugs, 20,21 organic pollutants, 22 and biologically important compounds.…”

Section: Introductionmentioning

confidence: 99%

Uncured Polydimethylsiloxane as Binder Agent for Carbon Paste Electrodes: Application to the Quantification of Propranolol

Araújo

Pradela‐Filho

Santos

et al. 2019

J. Braz. Chem. Soc.

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This study describes the use of uncured polydimethylsiloxane (PDMS) as a binder agent to prepare carbon paste electrodes (CPEs). A comparative study between the properties of CPEs prepared with PDMS and mineral oil Nujol ® , the most common binder agent for CPEs, was carried out. Cyclic voltammetry, electrochemical impedance spectroscopy, and chronoamperometry showed that PDMS-CPEs presented higher electrical conductivity, active electrochemical area, and wider useful potential window compared with Nujol ®-CPEs. Moreover, PDMS-CPEs were more stable in aqueous mixtures containing 50% (v/v) of ethanol or methanol than Nujol ®-CPEs. PDMS-CPEs have also provided higher sensitivity and lower limit of detection to propranolol than Nujol ®-CPE. Therefore, this study demonstrated that PDMS is a promising alternative binder agent able to produce CPEs with superior chemical/electrochemical stability and improved analytical performance.

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Section: Introductionmentioning

confidence: 99%

Uncured Polydimethylsiloxane as Binder Agent for Carbon Paste Electrodes: Application to the Quantification of Propranolol

Araújo

Pradela‐Filho

Santos

et al. 2019

J. Braz. Chem. Soc.

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“…13 The use of carbon paste electrodes 14 (CPEs) as working electrodes in ASV is a particularly interesting approach for metal ions determination, 15 since these electrodes can be prepared in a very simple and inexpensive way, and they are easily chemically modified. [15][16][17] Literature has demonstrated that CPEs modified with mercury, 18 tin 19 and bismuth 20 can be successfully used for metal ions determination. Among these modifiers, Bi is specially advantageous due to its low toxicity, insensitivity to dissolved oxygen and high ability to form alloys with various metal species.…”

Section: Introductionmentioning

confidence: 99%

Voltammetric Determination of Zn2+ in Antiseptic Dusting Powder and Multivitamins Using a Carbon Paste Electrode Modified with Bi Anchored on Amberlite® IR120

Fonseca¹,

Ribeiro²,

Pradela‐Filho³

et al. 2018

J. Braz. Chem. Soc.

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This work presents a voltammetric method for Zn 2+ determination in antiseptic dusting powder and multivitamin commercial samples, combining an alkaline extraction using NaOH aqueous solution with a carbon paste electrode chemically modified with Bi anchored on Amberlite ® IR120 ion exchange resin (CPEAmb/Bi). The best conditions for electrode preparation were: 10% (m/m) of Amberlite ® IR 120; 30 s Bi 3+ accumulation time (open circuit) in 0.5 mmol L-1 Bi 3+ solution prepared in 0.1 mol L-1 acetate buffer (pH = 5.5). The analytical curve for Zn 2+ using the CPEAmb/Bi presented linear range from 0.05 to 8.2 μmol L-1 and the limit of detection was 10 nmol L-1. The voltammetric method was simple, fast, efficient and low-cost for the Zn 2+ determination in antiseptic dusting powder and multivitamin samples.

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“…Similarly, Jagdale et al [342] used spent coffee grounds to realize a relative humidity sensor with a starting response at 20% humidity. Further studies showed the use of biochar-based materials for the detection of ions (i.e., lead [343], copper [344], and zinc [345]) at concentrations of nmol/L and for organic materials in mmol/L concentrations [346,347]. Several authors have described the use of biochar-derived materials for biosensing.…”

Section: Other Uses Of Biocharmentioning

confidence: 99%

A Review of Non-Soil Biochar Applications

et al. 2020

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Biochar is the solid residue that is recovered after the thermal cracking of biomasses in an oxygen-free atmosphere. Biochar has been used for many years as a soil amendment and in general soil applications. Nonetheless, biochar is far more than a mere soil amendment. In this review, we report all the non-soil applications of biochar including environmental remediation, energy storage, composites, and catalyst production. We provide a general overview of the recent uses of biochar in material science, thus presenting this cheap and waste-derived material as a high value-added and carbonaceous source.

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Mercury nanodroplets supported at biochar for electrochemical determination of zinc ions using a carbon paste electrode

Cited by 52 publications

References 22 publications

Uncured Polydimethylsiloxane as Binder Agent for Carbon Paste Electrodes: Application to the Quantification of Propranolol

Uncured Polydimethylsiloxane as Binder Agent for Carbon Paste Electrodes: Application to the Quantification of Propranolol

Voltammetric Determination of Zn2+ in Antiseptic Dusting Powder and Multivitamins Using a Carbon Paste Electrode Modified with Bi Anchored on Amberlite® IR120

A Review of Non-Soil Biochar Applications

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