Cathodic stripping voltammetric determination of arsenic in sugarcane brandy at a modified carbon nanotube paste electrode

Teixeira, Meryene C.; Tavares, Elisângela de Fátima Lisboa; Saczk, Adelir Aparecida; Okumura, Leonardo Luiz; Cardoso, María das Graças; Magriotis, Zuy M.; Oliveira, Marcelo Firmino de

doi:10.1016/j.foodchem.2013.12.076

Cited by 46 publications

(10 citation statements)

References 22 publications

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“…The linear ranges were 30–500 μM for phenylarsonic acid and 2–500 μM for arsenate. The LODs of both species are comparable with those from electrochemical methods and from sensors based on gold nanoparticles . The LOD for arsenate (As(V)) is also sufficient to meet the World Health Organization's guideline value of 10 µg L −1 elementary arsenic .…”

Section: Resultsmentioning

confidence: 83%

Hyphenation of capillary high‐performance ion‐exchange chromatography with mass spectrometry using sheath‐flow electrospray ionization

Kochmann

Matysik

2014

Rapid Comm Mass Spectrometry

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RATIONALE: Mass spectrometry (MS) is an attractive method for extending capillary-size ion chromatography (cHPIC) to create a valuable technique for speciation analysis. For hyphenation, the aqueous effluent of cHPIC has to be transformed into a volatile mixture for MS while preserving analytical concentrations as well as peak shapes during transfer from cHPIC to MS. Finally, the approach should technically be flexible and easy-to-use. A combination of cHPIC and sheath-flow electrospray ionization (ESI)-MS offers to solve all these challenges. METHODS: cHPIC/sheath-flow-ESI-TOFMS was used in this study for the speciation analysis of various arsenic model compounds. These model compounds were analyzed with different hyphenation setups and configurations of cHPIC/MS and their respective assets and drawbacks were examined and discussed. The parameters (flow rate and composition of sheath liquid) of sheath-flow ESI and their influence on the performance of the spray and the sensitivity of the detector were investigated and compared with those of sheathless ESI. RESULTS: Using an injection valve to couple cHPIC and MS was found to be the best method for hyphenation, since it constitutes a flexible and dead-volume-free approach. The investigation of sheath-flow ESI revealed that the flow rate of the sheath liquid has to resemble the flow rate of the IC effluent to ensure a stable spray and that a composition of 2-propanol/water/ammonia at 50:50:0.2 (v/v/v) suits most applications without unilaterally promoting the sensitivity for either organic or inorganic compounds. The optimized setup and conditions were successfully applied to the analysis of a mixture of important arsenic species and used to determine limits of detection of organic and inorganic arsenic species (3.7 μg L À1 elemental arsenic). CONCLUSIONS: A method for cHPIC/sheath-flow-ESI-MS was developed. The method was shown to be a valuable tool for speciation and trace analysis. It features no dead volume, fast transfer from IC to MS, only minimal peak-widening, high reproducibility, and the ability to fine-tune the ESI spray for higher sensitivity and stability by adjusting the composition of the sheath-liquid.

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Section: Resultsmentioning

confidence: 83%

Hyphenation of capillary high‐performance ion‐exchange chromatography with mass spectrometry using sheath‐flow electrospray ionization

Kochmann

Matysik

2014

Rapid Comm Mass Spectrometry

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“…It was reported previously that the carbon Nanotube with silicone showed significant enhanced detection limit comparing to the mineral oil. The LOD and LOQ values were reported 10.3 and 34.5 μg/L (for mineral oil); 3.4 μg/L and 11.2 μg/L (for silicone), respectively [44]. Similarly, the detection limit was obtained 4.4 μg/L for As(V) with the determination limit 11 μg/L [45].…”

Section: Concentration Dependence Studiesmentioning

confidence: 77%

Use of hybrid materials in the trace determination of As(V) from aqueous solutions: An electrochemical study

Tiwari

Jamsheera

Zirlianngura

et al. 2017

Environmental Engineering Research

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The carbon paste electrode (CPE) was modified with the pristine bentonite and hybrid material (HDTMA-modified bentonite). The modified-CPEs are then employed as working electrode in an electrochemical detection of As(V) from aqueous solutions using the cyclic voltammetric measurements. Cyclic voltammograms revealed that As(V) showed reversible behavior onto the working electrode. The hybrid material-modified carbon paste electrode showed significantly enhanced electrochemical signal which was then utilized in the low level detection of As(V). Moreover, the studies were conducted at neutral pH conditions. The electrochemical studies were conducted with scan rates (20 to 200 mV/s) to deduce the mechanism of redox processes involved at the electrode surface. The anodic current was linearly increased, increasing the concentration of As(V) from 5.0 to 35.0 μg/g using the hybrid material-modified electrode. This provided fairly a good calibration line for As(V) detection. The presence of varied concentrations of As(III) in the determination of total arsenic was studied. The influence of several cations and anions viz., Cu(II), Mn(II), Zn(II), Pb(II), Cd(II), Fe(III), Cl-, NO3-, PO4 3-, EDTA and glycine in the detection of As(V) from aqueous solution was also studied. Further, in an attempt to simulate the real matrix analysis, the tap water sample was spiked with As(V) and subjected for As(V) detection using the modified-CPE.

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“…While performing electrochemical measurements a wide linear range of 30 to 110 μg L À 1 and from 10 to 110 μg L À 1 was found for LSV and DPV respectively. [109] Wang et al developed a nafion loaded CNT modified GCE electrode. CNTs are uniformly dispersed in nafion and form a thin film on GCE.…”

Section: Recognition Of Metal Cationsmentioning

confidence: 99%

Carbon Nanotubes and its Potential Application in Sensing

Billing

2021

ChemistrySelect

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This study provides overview of the different type of nanomaterials depending upon their size, and type, however focusing more on the Carbon Nanotubes. This review highlights the different synthesis and purification techniques and also the functionalization methods of Carbon Nanotubes (CNTs). In particular, molecular recognition application of Carbon Nanotubes is explored in the present study. The majority of data was collected for optical and electrochemical studies of Carbon Nanotube based platform for the detection of metal ions, anions, nitroaromatics, biomolecules and gas molecules since last two decades. This review ends with an outlook of future perspectives that could be employed in nano sensor fabrication. I believe this review will act as a road map to guide the new researchers towards the concept of nanofabrication that can be employed to develop Carbon Nanotube based platform for sensing applications.

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Cathodic stripping voltammetric determination of arsenic in sugarcane brandy at a modified carbon nanotube paste electrode

Cited by 46 publications

References 22 publications

Hyphenation of capillary high‐performance ion‐exchange chromatography with mass spectrometry using sheath‐flow electrospray ionization

Hyphenation of capillary high‐performance ion‐exchange chromatography with mass spectrometry using sheath‐flow electrospray ionization

Use of hybrid materials in the trace determination of As(V) from aqueous solutions: An electrochemical study

Carbon Nanotubes and its Potential Application in Sensing

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