scholarly journals Determination of Trace Levels of Nickel(II) by Adsorptive Stripping Voltammetry Using a Disposable and Low-Cost Carbon Screen-Printed Electrode

Chemosensors ◽  
2021 ◽  
Vol 9 (5) ◽  
pp. 94
Author(s):  
Víctor Padilla ◽  
Núria Serrano ◽  
José Manuel Díaz-Cruz
Keyword(s):  
Limit Of Detection ◽  
Low Cost ◽  
Stripping Voltammetry ◽  
Differential Pulse ◽  
Adsorptive Stripping Voltammetry ◽  
Carbon Surface ◽  
Complexing Agent ◽  
Relative Standard ◽  
Screen Printed

A commercial and disposable screen-printed carbon electrode (SPCE) has been proposed for a fast, simple and low-cost determination of Ni(II) at very low concentration levels by differential pulse adsorptive stripping voltammetry (DPAdSV) in the presence of dimethylglyoxime (DMG) as complexing agent. In contrast with previously proposed methods, the Ni(II)-DMG complex adsorbs directly on the screen-printed carbon surface, with no need of mercury, bismuth or antimony coatings. Well-defined stripping peaks and a linear dependence of the peak area on the concentration of Ni(II) was achieved in the range from 1.7 to 150 µg L−1, with a limit of detection of 0.5 µg L−1 using a deposition time of 120 s. An excellent reproducibility and repeatability with 0.3% (n = 3) and 1.5% (n = 15) relative standard deviation, respectively, were obtained. In addition, the suitability of the SPCE as sensing unit has been successfully assessed in a wastewater certificated reference material with remarkable trueness and very good reproducibility.

Sensitive quantification of trace zinc in water samples by adsorptive stripping voltammetry

2013 ◽  
Vol 69 (2) ◽  
pp. 438-442 ◽  
Author(s):  
Shahryar Abbasi ◽  
Abbas Farmany ◽  
Mahmoud Roushani ◽  
Seyede Shima Mortazavi
Keyword(s):  
Water Samples ◽  
Mineral Water ◽  
Stripping Voltammetry ◽  
Adsorptive Stripping Voltammetry ◽  
Complexing Agent ◽  
Peak Current ◽  
Relative Standard ◽  
Preconcentration Time ◽  
Influence Of Ph

A simple and sensitive adsorptive stripping voltammetry method was developed for determination of Zn using N-nitrozo-N-phenylhydroxylamine (cupferron) as a selective complexing agent. This complex absorbed on the hanging mercury drop electrode and created a sensitive peak current. The peak current and concentration of zinc accorded with a linear relationship in the range of 0.85–320 ng mL−1. The influence of pH and the nature of supporting electrolytes, concentration of ligand, preconcentration time and applied potential were investigated. The relative standard deviation at a concentration level of 50 ng mL−1 was 1.8%. The method was applied to the determination of zinc in city, river and mineral water samples, with satisfactory results.

scholarly journals Preparation of NiO-graphene oxide nanosensor for adsorptive stripping voltammetric determination of dinoterbon in food samples

2016 ◽  
Vol 6 (3) ◽  
pp. 253
Author(s):  
Kasaram Roja ◽  
Puthalapattu Reddy Prasad ◽  
Punyasamudram Sandhya ◽  
Neelam Yugandhar Sreedhar
Keyword(s):  
Graphene Oxide ◽  
Limit Of Detection ◽  
Stripping Voltammetry ◽  
Pulse Amplitude ◽  
Deposition Potential ◽  
Food Samples ◽  
Adsorptive Stripping Voltammetry ◽  
Relative Standard ◽  
Single Well

<p class="PaperAbstract"><span lang="EN-US">Graphene oxide (GO) modified NiO electrochemical nanosensor was developed for the determination of the dinoterbon in food samples using adsorptive stripping voltammetry. The modified nanosensor characterized by TEM, XRD, cyclic and adsorptive stripping voltammetry. Dinoterbon pesticide exhibited a single well-defined cathodic peak at pH 4.0 at Britton–Robinson buffer (-810.0 mV). The voltammetric characterization of the pesti­cide residues is evaluated and the parameter such as the effect of pH, scan rate, pulse amplitude, deposition potential and deposition time were optimized. The current–concen­tration plot obtained using this peak was straight-lined over the range from 0.05 to 40.00 µg mL<sup>-1 </sup>with limit of detection (LOD) 0.028 µg mL<sup>-1</sup>. The proposed method was efficiently applied to the determination of dinoterbon in food samples. The mean recoveries of the pesticide 97.40 to 99.88 % with a relative standard deviation of 0.114 % in food samples respectively.</span></p>

scholarly journals Preparation of NiO-graphene oxide nanosensor for adsorptive stripping voltammetric determination of dinoterbon in food samples

2016 ◽  
Vol 6 (3) ◽  
pp. 253
Author(s):  
Kasaram Roja ◽  
Puthalapattu Reddy Prasad ◽  
Punyasamudram Sandhya ◽  
Neelam Yugandhar Sreedhar
Keyword(s):  
Graphene Oxide ◽  
Limit Of Detection ◽  
Stripping Voltammetry ◽  
Pulse Amplitude ◽  
Deposition Potential ◽  
Food Samples ◽  
Adsorptive Stripping Voltammetry ◽  
Relative Standard ◽  
Single Well

<p class="PaperAbstract"><span lang="EN-US">Graphene oxide (GO) modified NiO electrochemical nanosensor was developed for the determination of the dinoterbon in food samples using adsorptive stripping voltammetry. The modified nanosensor characterized by TEM, XRD, cyclic and adsorptive stripping voltammetry. Dinoterbon pesticide exhibited a single well-defined cathodic peak at pH 4.0 at Britton–Robinson buffer (-810.0 mV). The voltammetric characterization of the pesti­cide residues is evaluated and the parameter such as the effect of pH, scan rate, pulse amplitude, deposition potential and deposition time were optimized. The current–concen­tration plot obtained using this peak was straight-lined over the range from 0.05 to 50.00 µg mL<sup>-1 </sup>with limit of detection (LOD) 0.028 µg mL<sup>-1</sup>. The proposed method was efficiently applied to the determination of dinoterbon in food samples. The mean recoveries of the pesticide 97.40 to 99.88 % with a relative standard deviation of 0.114 % in food samples respectively.</span></p><br /><p><strong> </strong></p>

scholarly journals SIMULTANEOUS DETERMINATION OF CADMIUM, COPPER AND LEAD IN SEA WATER BY ADSORPTIVE STRIPPING VOLTAMMETRY IN THE PRESENCE OF CALCON AS A COMPLEXING AGENT

2013 ◽  
Vol 13 (3) ◽  
pp. 236-241 ◽  
Author(s):  
Deswati Deswati ◽  
Hamzar Suyani ◽  
Safni Safni ◽  
Umiati Loekman ◽  
Hilfi Pardi
Keyword(s):  
Simultaneous Determination ◽  
Sea Water ◽  
Stripping Voltammetry ◽  
Adsorptive Stripping Voltammetry ◽  
Complexing Agent ◽  
Optimum Conditions ◽  
Accumulation Time ◽  
Accumulation Potential ◽  
Relative Standard

A selective and sensitive adsorptive stripping voltammetric (AdSV) procedure for the simultaneous determination of cadmium, copper and lead in the sea water was conducted. The aim of this research is to get optimum condition for simultaneous determination of cadmium, copper and lead. Adsorptive stripping voltammetry has been used for determination of trace amount of Cd(II), Cu(II) and Pb (II) by using calcon as a complexing agent. The parameters studied were variation of calcon concentration, pH, accumulation potential and accumulation time. In this study, the optimum conditions were calcon concentration of 0.6 mM, pH = 4.0, accumulation potential of -0.7 V and accumulation time of 80 sec. At the optimum conditions, the relative standard deviation were 8.78%, 3.12%, and 4.02% for Cd(II), Cu(II) and Pb(II) respectively for eight replicates (n = 8) measurements of 10 μg/L mixed standard solution of Cd(II), Cu(II) and Pb(II). The method was applied to the direct simultaneous determination of Cd(II), Cu(II) and Pb(II) in sea water around Bungus, Padang City. Concentration of Cd(II), Cu(II) and Pb(II) in samples were equal to 1.8 μg/L for Cd(II), 38.6 μg/L for Cu(II) and 0.7 μg/L for Pb(II) with recovery of 87.03%, 98.80%, and 95.73%, respectively.

scholarly journals Spectroscopic and Voltammetric Analysis of Platinum Group Metals in Road Dust and Roadside Soil

Environments ◽  
2018 ◽  
Vol 5 (11) ◽  
pp. 120 ◽  
Author(s):  
Charlton van der Horst ◽  
Bongiwe Silwana ◽  
Emmanuel Iwuoha ◽  
Vernon Somerset
Keyword(s):  
Human Health ◽  
Limit Of Detection ◽  
Anthropogenic Activities ◽  
Stripping Voltammetry ◽  
Differential Pulse ◽  
Platinum Group Metals ◽  
Adsorptive Stripping Voltammetry ◽  
Good Precision ◽  
Voltammetric Analysis ◽  
Voltammetric Methods

The emission of toxic compounds by increasing anthropogenic activities affects human health and the environment. Heavy road traffic and mining activities are the major anthropogenic activities contributing to the presence of metals in the environment. The release of palladium (Pd), platinum (Pt), and rhodium (Rh) into the environment increases the levels of contamination in soils, road sediments, airborne particles, and plants. These Pd, Pt, and Rh in road dusts can be soluble and enter aquatic environment posing a risk to environment and human health. The aim of this study is to determine the levels of Pd, Pt, and Rh with spectroscopy and voltammetric methods. Potential interferences by other metal ions (Na(I), Fe(III), Ni(II), Co(II)) in voltammetric methods have also been investigated in this study. At all the sampling sites very low concentrations of Pd, Pt, and Rh were found at levels that range from 0.48 ± 0.05 to 5.44 ± 0.11 ng/g (dry weight (d.wt)) for Pd(II), with 17.28 ± 3.12 to 81.44 ± 3.07 pg/g (d.wt) for Pt(II), and 14.34 ± 3.08 to 53.35 ± 4.07 pg/g (d.wt) for Rh(III). The instrumental limit of detection for Pd, Pt, and Rh for Inductively Coupled Plasma Quadrupole-based Mass Spectrometry (ICP-QMS) analysis was found to be 3 × 10−6 µg/g, 3 × 10−6 µg/g and 1 × 10−6 µg/g, respectively. In the case of voltammetric analysis the instrumental limit of detection for Pd(II), Pt(II), and Rh(III) for differential pulse adsorptive stripping voltammetry was found to be 7 × 10−8 µg/g, 6 × 10−8 µg/g, and 2 × 10−7 µg/g, respectively. For the sensor application, good precision was obtained due to consistently reproduced the measurements with a reproducibility of 6.31% for Pt(II), 7.58% for Pd(II), and 5.37% for Rh(III) (n = 10). The reproducibility for ICP-QMS analysis were 1.58% for Pd(II), 1.12% for Pt(II), and 1.37% for Rh(III) (n = 5). In the case of repeatability for differential pulse adsorptive stripping voltammetry (DPAdSV) and ICP-QMS, good standard deviations of 0.01 for Pd(II); 0.02 for Pt(II), 0.009 for Rh(III) and 0.011 for Pd, 0.019 for Pt and 0.013 for Rh, respectively.

scholarly journals Sensitive and fast determination of papaverine by adsorptive stripping voltammetry on renewable mercury film electrode

2013 ◽  
Vol 11 (5) ◽  
pp. 736-741 ◽  
Author(s):  
Robert Piech ◽  
Beata Paczosa-Bator
Keyword(s):  
Mercury Electrode ◽  
Stripping Voltammetry ◽  
Differential Pulse ◽  
Calibration Graph ◽  
Adsorptive Stripping Voltammetry ◽  
Film Electrode ◽  
Mercury Film Electrode ◽  
Mercury Film ◽  
Preconcentration Time

AbstractThe renewable mercury film electrode, applied for the determination of papaverine traces using differential pulse adsorptive stripping voltammetry (DP AdSV) is presented. The calibration graph obtained for papaverine is linear from 1.25 nM (0.42 µg L−1) to 95 nM (32.2 µg L−1) for a preconcentration time of 60 s, with correlation coefficient of 0.998. For the renewable mercury electrode (Hg(Ag)FE) with a surface area of 9.1 mm2 the detection limit for a preconcentration time of 60 s is 0.7 nM (0.24 µg L−1). The repeatability of the method at a concentration level of the analyte as low as 17 µg L−1, expressed as RSD is 3.3% (n=5). The proposed method was successfully applied and validated by studying the recovery of papaverine from drugs, urine and synthetic solution.

scholarly journals Carvacrol electrochemical reaction characteristics on screen printed electrode modified with La2O3/Co3O4 nanocomposite

2019 ◽  
Vol 9 (2) ◽  
pp. 113-123 ◽  
Author(s):  
Sayed Zia Mohammadi ◽  
Hadi Beitollahi ◽  
Tahereh Rohani ◽  
Hossein Allahabadi
Keyword(s):  
Limit Of Detection ◽  
Phosphate Buffer Solution ◽  
Differential Pulse ◽  
Co3o4 Nanoparticles ◽  
Electrochemical Characteristics ◽  
Screen Printed Electrode ◽  
Buffer Solution ◽  
Voltammetric Techniques ◽  
Screen Printed

Electrochemical characteristics of carvacrol were investigated on a screen-printed electrode (SPE) modified with La2O3/Co3O4 nanocomposite by using voltammetric techniques, which displayed a well-defined peak for sensitive carvacrol determination in phosphate buffer solution (PBS) at pH 7.0. La2O3/Co3O4 nanoparticles demonstrated suitable catalytic activity for carvacrol determination by differential pulse voltammetry (DPV) technique. Besides, determination of carvacrol in a real samples was recognized in the light of electrochemical findings and a validated voltammetric technique for quantitative analysis of carvacrol in a real formulation was proposed. The DPV peak currents were found to be linear in the concentration range of 10.0 to 800.0 μM. The limit of detection (LOD) was found to be 1.0 μM.

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