Use of boron-doped diamond electrode pre-treated cathodically for the determination of trace metals in honey by differential pulse voltammetry

Honório, Gláucio Gualtieri; Azevedo, Gustavo Chevitarese; Matos, Maria Auxiliadora Costa; Oliveira, Marcone Augusto Leal de; Matos, Renato Camargo

doi:10.1016/j.foodcont.2013.08.004

Cited by 41 publications

(17 citation statements)

References 26 publications

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“…The limits of concentration were 0.206–61.8 µM for I and 0.955–95.5 µM for II. Among the usual carbon electrode materials (Pyrolytic and Glassy Carbon), in the last decade, the Boron‐Doped Diamond Electrode (BDD) has attracted attention due to its characteristics such as, large potential window in aqueous and non‐aqueous media, high chemical stability, low adsorption and low sensitivity to dissolved oxygen 10–14. Furthermore, determinations of pesticides have been investigated using BDD electrodes 15–20.…”

Section: Introductionmentioning

confidence: 99%

An Experimental Design for Simultaneous Determination of Carbendazim and Fenamiphos by Electrochemical Method

et al. 2015

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This study is aimed to develop an electroanalytical methodology using a boron‐doped diamond electrode (BDD) associated with experimental design in order to determine simultaneously and selectively carbendazin (CBZ) and fenamiphos (FNP) pesticides. In previous studies oxidation peaks were observed at 1.10 V (CBZ) and 1.20 V (FNP), respectively, with characteristics of irreversible processes controlled by diffusion of species (in pH 2.0 (CBZ) and pH 3.5 (FNP)) using a BR buffer 0.1 mol L−1 as support electrolyte. The differences between the potentials for both pesticides, (about 100 mV) indicate the possibility of selective determination of FNP and CBZ. However, employing an equimolar mixture of analytes, the peaks overlap to form a single oxidation peak. Thus, we used a 34 full factorial design with four parameters to be analyzed in three levels, in order to obtain the optimized parameters for the separation of the peaks. The best separation conditions were pH 5.0, square wave frequency of 300 s−1, pulse amplitude of 10 mV and scan increment of 2 mV. These parameters were used to obtain the calibration curves of CBZ and FNP. For CBZ the analytical curve was obtained in the concentration range of 4.95×10−6 to 6.90×10−5 mol L−1 with good sensitivity and linearity (0.175 A/mol L−1 and 0.999, respectively). The limits of detection (LOD) and quantification (LOQ) were 1.6×10−6 mol L−1 and 5.5×10−6 mol L−1, respectively. For FNP the linear concentration interval was 4.95×10−6 to 3.67×10−5 mol L−1, with a sensitivity of 0,207 A/mol L−1 and linearity of 0.996. The LOD and LOQ were 4.1×10−6 mol L−1 and 13.7×10−6 mol L−1, respectively. Using these experimental conditions it was possible to separate the oxidation peaks of CBZ (Ep=1.08 V) and FNP (Ep=1.23 V). The electroanlytical method was applied in lemon juice samples. The recovery values were 110.0 % and 92.5 % for CBZ and FNP, respectively. The results showed that the developed method is suitable for application in foodstuff samples.

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Section: Introductionmentioning

confidence: 99%

An Experimental Design for Simultaneous Determination of Carbendazim and Fenamiphos by Electrochemical Method

et al. 2015

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“…Also, for having a correct validating process for one analytical method, it is necessary to incorporate a confirmation method to obtain quality data. These last analyses may be performed using graphite furnace atomic absorption spectrometry [61].…”

Section: Methodsmentioning

confidence: 99%

Analytical Procedures for Determining Heavy Metal Contents in Honey: A Bioindicator of Environmental Pollution

Mejías¹,

Garrido²

2017

Honey Analysis

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Metals are pollutant residues detectable in honey and in fact account for most of the inorganic pollutants found in this food product. Metal pollutants can be accumulated through the food chain and, at levels exceeding safe thresholds, can be toxic to humans and even damage physiological functions. During the honey-making process, bees can transport pollutants to the beehive following contact with polluted botanic species or from drinking contaminated water. Detecting very low concentrations is a persisting challenge to accurately measure these elements in honey. Additionally, since honey is a complex organic matrix, treatments are needed prior to applying any classical chemical methods for metal determination, such as inductively coupled plasma and atomic absorption spectroscopy. Therefore, optimal results are dependent on adequate sample conditioning prior to heavy metal content analyses. Chemical pretreatments include calcination processes and/or acid digestion. Regarding execution, the last steps of any metal detection methodology are the primary determinants of result quality, where any loss of mass is reflected by unreliable values.

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“…The LOD values were determined as 1.2 and 7.0 ng L −1 for Pb 2+ and Cd 2+ , respectively. In another study, some trace metals were analyzed in a honey sample on a boron-doped diamond electrode via DPASV (Honório et al 2014). LOD was calculated as 0.40 and 1.28 ppb for Pb 2+ and Cd 2+ , respectively, in the article.…”

Section: Introductionmentioning

confidence: 99%

Carbonaceous Materials-12: a Novel Highly Sensitive Graphene Oxide-Based Carbon Electrode: Preparation, Characterization, and Heavy Metal Analysis in Food Samples

et al. 2015

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Graphene oxide (GO) was covalently attached to glassy carbon (GC) electrode (GC-O-GO) for fabricating nanosensors to determine trace Pb 2+ and Cd 2+ using differential pulse anodic stripping voltammetry (DPASV). Surface characterization of the nanofilm-covered electrode was performed via electrochemical cyclic voltammetry (CV), transmission electron microscopy (TEM), atomic force microscopy (AFM), and X-ray photoelectron spectroscopy (XPS) techniques. Surface pKa of the GO covalent attached GC (GC-O-GO) was calculated via CV. Under optimal conditions, a linear response was found for Pb 2+ and Cd 2+ in the range from 1×10 −8 to 1×10 −12 M. The limit of detections (LODs) of Pb 2+ and Cd 2+ were 0.25 pM and 0.28 pM, respectively. The method shows good reproducibility, and stability was successfully applied to measure Pb 2+ and Cd 2+ levels in rice, soya, milk, and tap water samples, with good agreement with those obtained by the standard inductively coupled plasma optical emission spectrometry (ICP-OES) method. The method was evaluated by application with the simultaneous determination of the ions in food samples (n=6) using the standard addition method. The recoveries of the Pb 2+ and Cd 2+ were up to 98 %.

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Use of boron-doped diamond electrode pre-treated cathodically for the determination of trace metals in honey by differential pulse voltammetry

Cited by 41 publications

References 26 publications

An Experimental Design for Simultaneous Determination of Carbendazim and Fenamiphos by Electrochemical Method

An Experimental Design for Simultaneous Determination of Carbendazim and Fenamiphos by Electrochemical Method

Analytical Procedures for Determining Heavy Metal Contents in Honey: A Bioindicator of Environmental Pollution

Carbonaceous Materials-12: a Novel Highly Sensitive Graphene Oxide-Based Carbon Electrode: Preparation, Characterization, and Heavy Metal Analysis in Food Samples

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