Stripping voltammetric determination of manganese in bioethanol

Lima, Fernanda F.; Tormin, Thiago F.; Richter, Eduardo M.; Muñoz, Rodrigo A.A.

doi:10.1016/j.microc.2014.05.005

Cited by 15 publications

(9 citation statements)

References 28 publications

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“…In this study, each batch of electrodes required a new Mn calibration curve, most likely due to the volatility of the carbon ink solvent, leading to varying batch‐to‐batch ink compositions. The buffer used for all experiments was 0.05 M acetic acid titrated with 0.125 M ammonium hydroxide to an optimized pH of 5.0 10d, x. Standard Mn solutions were diluted from the atomic absorption standard with the buffer.…”

Section: Methodsmentioning

confidence: 99%

“…Initially, because of its broader potential range, Hg electrodes were used with ASV to accommodate the reduction potential, but this was not optimal due to the low solubility of Mn in Hg 10f, j, m, r. ASV detection of Mn is also challenged by interference from H + reduction, which increases detection limits of Mn 10a, b, r, u, x.…”

Section: Introductionmentioning

confidence: 99%

“…As in ASV, the Mn concentration can be deduced from current peak height and/or area. Previously used electrode materials for CSV of Mn include boron‐doped diamond 10a, 11, palladium/copper 5b, and various modifications of carbon 5a, 10b–e, h, n–p, u, x, 12. These electrodes can be expensive and/or require larger sample volume compared to the carbon electrodes in this work.…”

Section: Introductionmentioning

confidence: 99%

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Morphology and Phase Evolution of CoAl Layered Double Hydroxides in an Alkaline Environment with Enhanced Pseudocapacitive Performance

et al. 2015

ChemElectroChem

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The morphology and phase transformation of CoAl layered double hydroxide (denoted CAL) nanoplates are systematically investigated in highly concentrated basic solution. Characterization results reveal that this is a time‐dependent process, in which CALs are gradually converted to β‐Co(OH)2 and CoOOH, and the structure becomes increasingly porous. This process could be caused by the dissolution of the Al part of CoAl LDHs, recrystallization of the Co part, and subsequent oxidation of Co. It is found that the pseudocapacitive performance of the products vary with the immersion time. CALs already show a reasonable performance, whereas short‐term treatment would lead to the enhanced capacitance of 1123 F g−1 with both remarkable rate capability and stability. However, the formation of CoOOH will significantly degrade the supercapacitive performance.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Morphology and Phase Evolution of CoAl Layered Double Hydroxides in an Alkaline Environment with Enhanced Pseudocapacitive Performance

et al. 2015

ChemElectroChem

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“…Electrochemical techniques, including anodic and cathodic stripping voltammetry , offer attractive alternatives that are not only sensitive and reproducible, but are rapid and easy to miniaturize ,. These approaches have been demonstrated for the determination of Mn(II) with bulk electrodes fabricated from a wide range of electrode materials, including mercury ,, bismuth ,, boron‐doped diamond ,, carbon , and carbon nanotubes . To address the need for a portable detection system, microscale electrodes are necessary—for instance a stencil‐printed carbon ink electrode on transparent film reported by Bert.…”

Section: Introductionmentioning

confidence: 99%

Determination of Manganese by Cathodic Stripping Voltammetry on a Microfabricated Platinum Thin–film Electrode

et al. 2017

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In this work, we report on the determination of trace manganese (Mn) using cathodic stripping voltammetry (CSV) using a microfabricated sensor with a Pt thin-film working electrode. While an essential trace metal for human health, prolonged exposure to Mn tends to gradually impair our neurological system. The potential sources of Mn exposure make it necessary to monitor the concentration in various sample matrices. Previous work by us and others suggested CSV as an effective method for measuring trace Mn. The analytical performance metrics were characterized and optimized, leading to a calculated limit of detection (LOD) of 16.3 nM (0.9 ppb) in pH 5.5, 0.2 M acetate buffer. Further, we successfully validated Mn determination in surface water with ~90% accuracy and >97% precision as compared with ICP-MS “gold standard” measurement. Ultimately, with stable, accurate and precise electrochemical performance, this Pt sensor permits rapid monitoring of Mn in environmental samples, and could potentially be used for point-of-use measurements if coupled with portable instrumentation

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“…At the concentration of 100 μg L −1 , Cd(II), Cu(II) and Zn(II) did not present any stripping peak under conditions optimized for Pb(II) determination, although Cd(II) was a possible interfering metal to Pb(II) detection using vibrating gold microwire electrode according to a previous study 29. Therefore, the electrodeposition of Cd(II) on the SPGE surface interferes on the efficiency of electrodeposition of Pb(II) due to a possible competition between both electrodeposition processes 30,31.…”

Section: Resultsmentioning

confidence: 93%

Voltammetric Lead Determination in Aviation Fuel Samples Using a Screen‐Printed Gold Electrode and Batch‐Injection Analysis

2015

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This work presents the lead determination in aviation (bio)fuels using disposable screen‐printed gold electrodes (SPGEs) adapted on a batch‐injection cell associated with a micropipette for portable analysis. The method involves injections of 200 µL of sample or standard solutions at controlled dispensing rate (4.8 µL s−1) during deposition step (−550 mV for 90 s), followed by anodic‐stripping voltammetry. Either samples treated by sonication or dry‐ashing can be analyzed with detection limits of 0.0071 and 0.0008 µg g−1 Pb, respectively. A single SPGE can be applied for 60 consecutive measurements (or 120 for samples dry‐ashed). The ultrasound‐assisted treatment is faster, safer, and easily adapted for on‐site analyses, especially considering the portable characteristics of commercially‐available potentiostats and batch‐injection analysis cell using SPGEs.

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Stripping voltammetric determination of manganese in bioethanol

Cited by 15 publications

References 28 publications

Morphology and Phase Evolution of CoAl Layered Double Hydroxides in an Alkaline Environment with Enhanced Pseudocapacitive Performance

Morphology and Phase Evolution of CoAl Layered Double Hydroxides in an Alkaline Environment with Enhanced Pseudocapacitive Performance

Determination of Manganese by Cathodic Stripping Voltammetry on a Microfabricated Platinum Thin–film Electrode

Voltammetric Lead Determination in Aviation Fuel Samples Using a Screen‐Printed Gold Electrode and Batch‐Injection Analysis

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