scholarly journals Platinum and Rhodium in Potatoes Samples by Using Voltammetric Techniques

2019 ◽  
Author(s):  
Santino Orecchio ◽  
Diana Amorello
Keyword(s):  
Solanum Tuberosum ◽  
Standard Method ◽  
Analytical Approach ◽  
Standard Addition ◽  
Stripping Voltammetry ◽  
Differential Pulse ◽  
Nutritional Values ◽  
Quantification Limit ◽  
Voltammetric Techniques ◽  
Pulse Voltammetry

Potato is a starchy, tuberous crop from the perennial Solanum tuberosum having high nutritional values. This paper is the first analytical approach to quantify Pt and Rh in vegetal food. In this study a total of 38 different potatoes samples produced in Europe and one in Australia were investigated. Determinations of Pt and Rh in potatoes samples were carried out by Differential Pulse Voltammetry (DPV/a) for platinum and by Adsorptive Stripping Voltammetry (AdSV) for Rh using standard addition procedure. Because no certified reference potatoes containing platinum and rhodium are available, we used addition standard method. The quantification limits for Pt and Rh are 0.007 and 0.0008 μg Kg−1 respectively. Considering all the potatoes samples, concentrations of Pt and Rh vary in the ranges from 0.007 to 109 μg Kg−1 (sample n° 6 potatoes grown in Sicily) and from 0.0008 to 0.030 μg Kg−1 (sample n°23 of potatoes grown in Emilia Romagna) respectively. For both metals, in many cases the concentrations fall near the quantification limit. In all the samples, platinum is always more abundant than rhodium and their ratio meanly is 14500, which is much greater than that of the earth's crust (about 100).

scholarly journals Platinum and Rhodium in Potatoes Samples by Using Voltammetric Techniques

2018 ◽  
Author(s):  
Santino Orecchio ◽  
Diana Amorello
Keyword(s):  
Solanum Tuberosum ◽  
Standard Method ◽  
Analytical Approach ◽  
Standard Addition ◽  
Stripping Voltammetry ◽  
Differential Pulse ◽  
Nutritional Values ◽  
Quantification Limit ◽  
Voltammetric Techniques ◽  
Pulse Voltammetry

Potato is a starchy, tuberous crop from the perennial Solanum tuberosum having high nutritional values. This paper is the first analytical approach to quantify Pt and Rh in vegetal food. In this study a total of 38 different potatoes samples produced in Europe and one in Australia were investigated. Determinations of Pt and Rh in potatoes samples were carried out by Differential Pulse Voltammetry (DPV/a) for platinum and by Adsorptive Stripping Voltammetry (AdSV) for Rh using standard addition procedure. Because no certified reference potatoes containing platinum and rhodium are available, we used addition standard method. The quantification limits for Pt and Rh are 0.007 and 0.0008 μg Kg−1 respectively. Considering all the potatoes samples, concentrations of Pt and Rh vary in the ranges from 0.007 to 109 μg Kg−1 (sample n° 6 potatoes grown in Sicily) and from 0.0008 to 0.030 μg Kg−1 (sample n°23 of potatoes grown in Emilia Romagna) respectively. For both metals, in many cases the concentrations fall near the quantification limit. In all the samples, platinum is always more abundant than rhodium and their ratio meanly is 14500, which is much greater than that of the earth's crust (about 100).

scholarly journals Platinum and Rhodium in Potato Samples by Using Voltammetric Techniques

Foods ◽  
2019 ◽  
Vol 8 (2) ◽  
pp. 59 ◽  
Author(s):  
Santino Orecchio ◽  
Diana Amorello
Keyword(s):  
Solanum Tuberosum ◽  
Standard Method ◽  
Analytical Approach ◽  
Standard Addition ◽  
Stripping Voltammetry ◽  
Differential Pulse ◽  
Nutritional Values ◽  
Quantification Limit ◽  
Voltammetric Techniques ◽  
Pulse Voltammetry

Potato is a starchy, tuberous crop from the perennial Solanum tuberosum having high nutritional values. This paper is the first analytical approach to quantify Pt and Rh in vegetal food. In this study a total of 38 different potato samples produced in Europe and one in Australia were investigated. Determinations of Pt and Rh in potato samples were carried out by Differential pulse voltammetry (DPV/a) for platinum and by Adsorptive stripping voltammetry (AdSV) for Rh using standard addition procedure. Because no certified reference potatoes containing platinum and rhodium are available, we used addition standard method. The quantification limits for Pt and Rh are 0.007 and 0.0008 μg kg−1 respectively. Considering all the potato samples, concentrations of Pt and Rh vary in the ranges from 0.007 to 109 μg kg−1 (sample no, 6 potatoes grown in Sicily) and from 0.0008 to 0.030 μg kg−1 (sample no. 3 of potatoes grown in Emilia Romagna), respectively. For both metals, in many cases the concentrations fall near the quantification limit. In all the samples, platinum is always more abundant than rhodium and their mean ratio is 14,500, which is much greater than that of the Earth’s crust (about 100).

scholarly journals Quantification of Platinum in Edible Mushrooms Using Voltammetric Techniques

Pollutants ◽  
2021 ◽  
Vol 1 (4) ◽  
pp. 270-277
Author(s):  
Diana Amorello ◽  
Santino Orecchio
Keyword(s):  
Standard Addition ◽  
Differential Pulse ◽  
Edible Mushroom ◽  
Edible Mushrooms ◽  
Nutritional Values ◽  
Voltammetric Techniques ◽  
Consistent Method ◽  
Ultra Trace ◽  
Ultra Trace Analysis

Edible mushrooms are a food source with interesting nutritional values. The chief objective of this research was to develop a consistent method for the quantitative ultra-trace analysis of Pt in mushrooms, which is complex because it cannot be readily quantified by common analytical procedures. This research is one of the first analytical methods to establish Pt amount in these vegetables. In this research, 28 different edible mushroom samples from Italy were investigated. Determination of Pt in mushrooms was completed using Differential Pulse Voltammetry (DPV). In this study, we applied the standard addition method because there are no certified reference mushrooms containing platinum group elements on the market. The platinum quantification limit was 0.03 µg kg−1 d.w. In the analyzed samples, platinum amount was in the range of 0.03–73 µg kg−1. Our mushroom samples had a Pt content lower than the concentrations recommended by international establishments for other foodstuffs. In the future, the optimized method could be used for the analysis of plant and animal matrices intended for food supply.

Use Differential Pulse Voltammetry for Determining the 2,6-Ditertbutyl-4-Methylphenol in Jet Fuels

2012 ◽  
Vol 455-456 ◽  
pp. 716-720 ◽  
Author(s):  
Yong Gang Shi ◽  
Bin Su ◽  
Hai Feng Gong ◽  
Yan Xue
Keyword(s):  
Differential Pulse Voltammetry ◽  
Standard Addition ◽  
Differential Pulse ◽  
Jet Fuel ◽  
Jet Fuels ◽  
Addition Method ◽  
Electrolytic Solution ◽  
Voltammetric Characteristics ◽  
Pulse Voltammetry

A new method for determination of antioxidants in jet fuels, which is based on the differential pulse voltammetric characteristics of the antioxidant 2,6-ditertbutyl-4-methylphenol in the solution of saturated KOH anhydrous ethyl alcohols, is established. The experimental results have shown that there is a linear relationship between the content of 2,6-ditertbutyl-4-Methyl-phenol in the jet fuel and the differential pulse voltammetry response in the electrolytic solution. It has also been shown that the antioxidant contents can be reliably and simply determined with the help of the standard addition method. The largest relative error of the determination is 6.70 %, the biggest confidence for 5 samples is 1.95 mg/L (n=5, 95% confidence level).

scholarly journals Differential Pulse Voltammetry as an Alternative Method for Tracking Hydrochlorothiazide Electrolytic Degradation

2021 ◽  
Vol 4 (3) ◽  
pp. 70-77
Author(s):  
Mohammad Khanfar
Keyword(s):  
Differential Pulse Voltammetry ◽  
Model Compound ◽  
Differential Pulse ◽  
Degradation Process ◽  
Constant Current ◽  
Solution Ph ◽  
Tracking Method ◽  
First Order Kinetics ◽  
Voltammetric Techniques ◽  
Pulse Voltammetry

This study aims to compare differential pulse voltammetry as a tracking method with chromatography and photometry. The three methods were used to track the degradation of the model compound hydrochlorothiazide (HCT) where 250ml of 0.50mM HCT solution (pH of 3.50 and ionic strength of 0.010M) was electrolyzed with 50.0mAmp constant current. The degradation process demonstrated great fit (R2 >0.99) with pseudo-first-order kinetics when the three tracking methods were utilized. However, different rate constants were reported for these methods: 0.032min-1, 0.016 min-1, and 0.0052min-1 for the chromatographic, photometric, and voltammetric techniques, respectively. The observed variation was attributed to the nature of the utilized probing methods. The differential pulse voltammetry is promising as an electrolytic decomposition tracking method; however, the working probe to target pollutants needs to be improved.

scholarly journals Determination of Methyldopa and Paracetamol in Pharmaceutical Samples by a Low Cost Genipa americana L. Polyphenol Oxidase Based Biosensor

2019 ◽  
Vol 9 (3) ◽  
pp. 416-422
Author(s):  
Rafael Souza Antunes ◽  
Douglas Vieira Thomaz ◽  
Luane Ferreira Garcia ◽  
Eric de Souza Gil ◽  
Vernon Sydwill Sommerset ◽  
...  
Keyword(s):  
Electrochemical Impedance ◽  
Low Cost ◽  
Differential Pulse ◽  
Pharmaceutical Samples ◽  
Polyphenol Oxidases ◽  
Voltammetric Techniques ◽  
Relative Standard ◽  
Pulse Voltammetry ◽  
Phenolic Drugs

Purpose: Jenipapo fruit (Genipa americana L) is a natural source of polyphenol oxidases (PPOs) whose potential in pharmaceutical analysis is noteworthy. Henceforth, this work reports the electrochemical study of a low-cost PPO-based biosensor produced from the crude extract of Jenipapo fruits and accounts a practical approach to employ this biosensor in the determination of methyldopa and paracetamol in pharmaceutical samples. Methods: In order to investigate the electrochemical properties of the biosensor, theoretical and practical approaches were employed, and both samples and the biosensor were analyzed through electrochemical impedance spectroscopy (EIS) and voltammetric techniques, namely: differential pulse voltammetry (DPV) and cyclic voltammetry (CV). Results: showcased that the biosensor presented good analytical features, as well as low detection limits (8 μmol L-1 for methyldopa and 5 μmol L-1 for paracetamol). The relative standard deviation was less than 5% mid-assay. Conclusion: The use of this biosensor is a reliable, low cost and useful alternative in the pharmaceutic determination of phenolic drugs (e.g. methyldopa and paracetamol).

Polarographic and Voltammetric Determination of 1-Nitropyrene

2000 ◽  
Vol 65 (12) ◽  
pp. 1888-1896 ◽  
Author(s):  
Jiří Barek ◽  
Jiří Zima ◽  
Josino C. Moreira ◽  
Alexandr Muck
Keyword(s):  
Mercury Electrode ◽  
Stripping Voltammetry ◽  
Differential Pulse ◽  
Differential Pulse Polarography ◽  
Optimum Conditions ◽  
Pulse Polarography ◽  
Dropping Mercury Electrode ◽  
Pulse Voltammetry ◽  
The Given

The polarographic behaviour of 1-nitropyrene was investigated by tast polarography, differential pulse polarography (both with a dropping mercury electrode), differential pulse voltammetry, and adsorptive stripping voltammetry (both with a hanging mercury drop electrode). Optimum conditions have been found for its determination by the given methods in the concentration ranges 2-100, 0.2-100, 0.1-10, and 0.001-0.01 μmol l-1, respectively.

scholarly journals Determination of Trace Metal Ions in Common Salt by Stripping Voltammetry

1999 ◽  
Vol 82 (6) ◽  
pp. 1413-1418 ◽  
Author(s):  
Azza M M Ali
Keyword(s):  
Metal Ion ◽  
Supporting Electrolyte ◽  
Standard Addition ◽  
Stripping Voltammetry ◽  
Differential Pulse ◽  
Ion Concentration ◽  
Common Salt ◽  
Trace Metal Ions

Abstract Sensitive voltammetric methods using cathodic and anodic differential pulse stripping techniques were applied for determination of trace ions cadmium(II), cobalt(II), copper(II), lead(II), manganese(II), nickel(II), and zinc(II), which are usually found in different grades of common salt as contaminants. The optimal conditions, i.e., deposition time, preconcentration potential, supporting electrolyte, and ionic strength, were investigated for each metal ion. Concentration of the metal ion was determined by the standard addition method. Metal content varied according to the quality of the table salt.

scholarly journals Determination of Zn, Cd, Pb and Cu metals in ground water of District Hapur, Uttar Pradesh (India) by anodic stripping voltammetric technique

2014 ◽  
Vol 15 (1&2) ◽  
pp. 195-199
Author(s):  
Udit Mohan ◽  
Randhir Singh ◽  
Prem Singh ◽  
Suhas N. ◽  
Poonam Kashyap Prusty ◽  
...  
Keyword(s):  
Ground Water ◽  
Anodic Stripping Voltammetry ◽  
Uttar Pradesh ◽  
Standard Addition ◽  
Stripping Voltammetry ◽  
Pulse Amplitude ◽  
Differential Pulse ◽  
Acetate Solution ◽  
Anodic Stripping

In the present communication determination of Zn, Cd, Pb and Cu metals has been carried out from ground water of Hapur District, Uttar Pradesh (India) using differential pulse anodic stripping voltammetry (DPASV) at Hanging Mercury Dropping Electrode (HMDE). Determination of Zn, Cd, Pb and Cu was carried out by using acetate solution as buffer (pH 4.6) with a sweep rate of 0.06 V/sec and pulse amplitude 0.05 V by HMDE by standard addition method. The minimum level of Zn, Cd, Pb and Cu should also be near to zero and the concentration found in the ground water sample of Hapur (India) as analyzed 2.1834, 0.0509, 0.0116 and 0.0331mg/L-1 respectively.

scholarly journals Application of a voltammetric enzymatic biosensor based on crude extract of Marasmiellus colocasiae for the detection of phenolic compounds in drinking water

2020 ◽  
Vol 15 (6) ◽  
pp. 1
Author(s):  
Érica Aparecida Batista ◽  
Luane Ferreira Garcia ◽  
Antonio João Carvalho de Albuquerque ◽  
Nara Ballaminut ◽  
Paulo Sérgio Scalize ◽  
...  
Keyword(s):  
Differential Pulse ◽  
Electrochemical Technique ◽  
Emerging Contaminant ◽  
Enzymatic Extract ◽  
The Public ◽  
Quantification Limit ◽  
Public Supply ◽  
Enzymatic Biosensor ◽  
Pharmaceutical Industries ◽  
Pulse Voltammetry

The chemical and pharmaceutical industries are the main generators of residues, such as phenolic microcontaminants, including catechol, resorcinol, p-nitrophenol and 4-chlorophenol. Therefore, this work aims to identify these microcontaminants through an emerging contaminant biosensor by means of an enzymatic biosensor constructed with an enzymatic extract from the fungus Marasmiellus colocasiae. Based on the differential pulse voltammetry electrochemical technique, the biosensor was used to analyze the patterns of catechol, resorcinol, p-nitrophenol and 4-chlorophenol. The analysis of a sample prepared with these standards in water from the public supply network was also carried out. As a result, it was possible to verify that the biosensor developed in this study is more sensitive than conventional methods and has a greater affinity for catechol. In the sample prepared with the standards, it was possible to qualitatively identify the presence of 4-chlorophenol, resorcinol and catechol. The proposed biosensor was sensitive and has potential for application in the analysis of microcontaminants in the environment with the detection limit = 0.17 µmol L-1, and the quantification limit = 0.52 µmol L-1.

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