Applicability of 2-Hydroxybenzaldehyde Benzoylhydrazone in the Determination of Trace metals by Adsorptive Cathodic Stripping Voltammetry: Relevancy of Simultaneous Determinations

Espada-Bellido, Estrella; Riaño, M. D. Galindo; Aouarram, Abdellah; Garcı́a-Vargas, Manuel

doi:10.2116/analsci.25.903

Cited by 8 publications

(2 citation statements)

References 21 publications

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“…High quality nitrogen was used for deaeration of solution prior to any electrochemical measurements. The 2-hydroxybenzaldehyde benzoylhydrazone (2-HBBH) was synthesized as previously reported by Espada et al [36] and then recrystallized three times in 1:1 ethanol/water. The structure is shown in Fig.…”

Section: Reagentsmentioning

confidence: 99%

Determination of ultra-trace amounts of silver in water by differential pulse anodic stripping voltammetry using a new modified carbon paste electrode

El-Mai

Espada-Bellido

Stitou

et al. 2016

Talanta

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A highly sensitive and selective new procedure for the determination of silver in aqueous media was developed using a modified carbon paste electrode (MCPE) by differential pulse anodic stripping voltammetry (DPASV). The modified electrode was based on the incorporation of 2-hydroxybenzaldehyde benzoylhydrazone (2-HBBH) in the carbon paste electrode. Silver ions were preconcentrated on the modified electrode at open-circuit by complexation with the ligand and reduced to zero valent at a potential of 0V, and followed by the reoxidation of adsorbed ions onto the electrode by scanning the potential in a positive direction. The oxidation peak of Ag(I) was observed at 0.2V (versus Ag/AgCl). The analysis of Ag(I) was carried out in a cell containing the sample solution (20mL) buffered by 0.1molL(-1) K2HPO4/NaOH at pH 5.5 in aqueous solution and nitric acid (pH 1) in real water samples. The optimum conditions for the analysis of silver include a reduction potential of 0V and a pulse amplitude of 100mV, among others. The optimum carbon paste composition was found to be 14.1% (w/w) 2-HBBH, 56.2% (w/w) graphite powder and 29.7% (w/w) paraffin oil. Differential pulse anodic stripping voltammetric response was used as the analytical signal. Under the selected conditions, the voltammetric signal was proportional to the Ag(I) concentration in the range of 0.001-100μgL(-1) with favorable limits of detection and quantification of 1.1ngL(-1) and 3.7ngL(-1) after 3min of accumulation time, respectively. By increasing the accumulation time to 10min, detection and quantification limits can be further improved up to 0.1ngL(-1) and 0.34ngL(-1), respectively. In addition, the results showed a highly reproducible procedure showing a relative standard deviation of 1.5% for 12 replicate measurements. Many coexisting metal ions were investigated and very few interferences were found on the determination of Ag(I). The proposed method was validated using certified reference estuarine waters (SLEW-3) with a relative error of -1.3% and applied to the determination of silver ions in three river water samples collected from Guadalquivir river (relative errors of +3.4%, +1.5% and -0.7%). Moreover, the method was successfully applied to the speciation analysis of total silver, free silver ions and silver nanoparticles in aqueous solutions. The results were in good agreement with those obtained by inductively coupled plasma mass spectrometry (ICP-MS).

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Section: Reagentsmentioning

confidence: 99%

Determination of ultra-trace amounts of silver in water by differential pulse anodic stripping voltammetry using a new modified carbon paste electrode

El-Mai

Espada-Bellido

Stitou

et al. 2016

Talanta

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“…The 2-hydroxybenzaldehyde benzoylhydrazone 26 was synthesized by the reaction between 2-hydroxybenzaldehyde (2-HB) and benzoylhydrazine (BH), purchased from Sigma-Aldrich (Steinhein, Germany; see Fig. 1).…”

Section: Methodsmentioning

confidence: 99%

Colorimetric Solid-Phase Extraction Method for Cu(II) Ion Determination Using 2-Hydroxybenzaldehyde Benzoylhydrazone as Sensing Reagent

et al. 2014

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A new sensor based on the use of 2-hydroxybenzaldehyde benzoylhydrazone as a colorimetric reagent immobilized onto styrenedivinylbenzene disks has been carried out for the determination of Cu(II) ions within several minutes. The sensor is designed on a rapid and easy two-step procedure: (1) the extraction of Cu(II) ions onto a disk loaded with the copper-selective colorimetric reagent and (2) the determination of the complexed analyte directly on the surface of the disk using diffuse reflectance measurements at 400 nm. The color of the disk changed from white to green in the presence of Cu(II) ions. The work herein details the optimization of the sensing system employing a fractional factorial design 3(3-1) considering three variables (pH, immobilization time, and amount of ligand immobilized onto the disk). The Pareto chart and response surfaces in a spherical domain indicated that the optimum conditions for the sensing of copper ions were pH = 7, with a ligand immobilization time of 10 min and 6.25 mg of reagent loaded onto the disk. Under the optimum conditions, the analytical parameters of the proposed method were determined. The calibration graph was linear over the range of 0 to 2.5 mg L(-1) of Cu(II) with a detection limit of 0.21 mg L(-1). The relative standard deviation for six measurements of 1 mg L(-1) of Cu(II) was found to be 4.87%. The interference from inorganic salts and other metals was found not to be of major concern when monitoring copper ions in water samples. The simplicity and rapidity of this technique make it convenient and amenable for on-site and routine analysis.

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Simultaneous determination of Pb2+, Cd2+ and Zn2+ by adsorptive stripping voltammetry using Clioquinol as a chelating-adsorbent agent

Herrero

Arancibia

Rojas−Romo

2014

Journal of Electroanalytical Chemistry

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Applicability of 2-Hydroxybenzaldehyde Benzoylhydrazone in the Determination of Trace metals by Adsorptive Cathodic Stripping Voltammetry: Relevancy of Simultaneous Determinations

Cited by 8 publications

References 21 publications

Determination of ultra-trace amounts of silver in water by differential pulse anodic stripping voltammetry using a new modified carbon paste electrode

Determination of ultra-trace amounts of silver in water by differential pulse anodic stripping voltammetry using a new modified carbon paste electrode

Colorimetric Solid-Phase Extraction Method for Cu(II) Ion Determination Using 2-Hydroxybenzaldehyde Benzoylhydrazone as Sensing Reagent

Simultaneous determination of Pb2+, Cd2+ and Zn2+ by adsorptive stripping voltammetry using Clioquinol as a chelating-adsorbent agent

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