Fast and highly sensitive method for molybdenum(VI) determination by catalytic adsorptive stripping voltammetry

Arancibia, Veróníca; Rojas−Romo, Carlos; Aliaga, Margarita E.; Stegmann, Edgardo

doi:10.1016/j.snb.2017.11.107

Cited by 7 publications

(4 citation statements)

References 44 publications

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“…1,3,[9][10][11][12][13] In particular, adsorptive stripping voltammetry (AdSV), has been recognized as one of the most sensitive electrochemical methods for the determination of organic and inorganic trace toxic compounds. [14][15][16][17] Several research efforts have been devoted to the development of new electrochemical sensors for CAP determination based on chemical modification of electrodes. Electrode surface modifications with aptamer, 9 molecular-imprinted polymer, 18 metal nanoparticles, 3,10 carbon-based materials, 1,11,19 nanocomposite materials [20][21][22] and polymer films, [23][24][25] have all been studied.…”

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confidence: 99%

A Simple and Sensitive Electrochemical Sensor for Chloramphenicol Detection in Pharmaceutical Samples

Kaewnu

Promsuwan

Kanatharana

et al. 2020

J. Electrochem. Soc.

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This work presents a square-wave adsorptive stripping voltammetric sensor for the determination of chloramphenicol (CAP) using a glassy carbon electrode modified with branch-like poly (eriochrome black T) film (P(EBT)/GCE). Branch-like P(EBT) film on the GCE was prepared by electropolymerization using cyclic voltammetry. The morphology of the P(EBT)/GCE was characterized by scanning electron microscopy. The concentration of eriochrome black T monomer and the number of electropolymerization cycles used in the fabrication process were optimized. Operational conditions, such as accumulation potential and accumulation time were also optimized. Sensitive determinations were achieved from controlled adsorption at the P(EBT)/GCE. The P(EBT)/GCE exhibited two linear ranges, 0.01 to 0.10 and 0.10 to 4.0 μmol L−1, with high sensitivity (5.2 μAμM−1). The limit of detection and quantitation were 3 and 11 nmol L−1, respectively. Repeatability (RSD < 2.7%, n = 18), reproducibility (RSD < 2.8%, n = 6) and anti-interference were good. The sensor determined CAP in eye drops and ointment with recoveries between 96 ± 3% and 102 ± 1% (n = 3).

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confidence: 99%

A Simple and Sensitive Electrochemical Sensor for Chloramphenicol Detection in Pharmaceutical Samples

Kaewnu

Promsuwan

Kanatharana

et al. 2020

J. Electrochem. Soc.

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“…This study involves potentiometric determination of molybdenum (VI) in agricultural fertilizer. For the analysis of molybdenum, some methods have been recorded such as high-performance liquid chromatography (HPLC) [6][7][8], high performance liquid chromatography inductively coupled plasma mass spectrometry (HPLC-ICP-MS) [9,10], spectrophotometric [11,21] and voltametric methods [22][23][24][25][26][27][28][29]. Several instrumental methods, such as AAS, ICP and strip voltammetry are employed for the determination of molybdenum at low concentration level.…”

Section: Introductionmentioning

confidence: 99%

Chemical Modified Carbon Paste Electrode for Potentiometric Determination of Mo(VI) and its Application in Food Analysis and Agriculture Fertilizers

said

Abbas

2022

Electroanalysis

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Since to the best of our knowledge, there is no potentiometric sensors based on carbon paste electrodes were proposed for the potentiometric determination of molybdenum(VI) ion. In this study, 2,2'-(propane-1,3diylbis(oxy))dibenzoic acid (PBODBA) was synthesized and used as modifier in the fabrication of carbon paste electrode (CPE) for the quantification of molybdenum(VI). The developed electrodes I and II showed hexavalent Nernstian response of 9.80 � 0.05 and 9.90 � 0.08 mV decade À 1 over the concentration ranges of 1.0 × 10 À 7 -1.0 × 10 À 3 and 1.0 × 10 À 8 -1.0 × 10 À 3 mol L À 1 , respectively. The electrodes showed good selectivity for Mo(VI). The modified electrodes were applied for the determination of Mo(VI) concentration in masscuaje agricultural fertilizer and spiked juice extractions containing several metals.

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“…6,7 Among the voltammetric methods, voltammetric redissolution techniques can be used, which can be carried out in three ways: anodic, cathodic and adsorptive, being that the adsorptive is the one that best adapts to the determinations for elements that are presented in low levels, in different matrices, being already used for determinations of vitamin K1 in foods, 8,9 fungicides such as fenaxanil 10 and Mo VI in water samples. 11 Adsorptive cathodic stripping voltammetry (AdCSV) 3,12-15 is a method that detects an electrochemically active complex formed by the reaction of the metal and a binder added to the sample. It consists of the accumulation of the analyte in the form of a suitable complex that is adsorbed on the surface of the electrode and subsequent, redissolution of the adsorptive material by cathodic scan of the potential.…”

Section: Introductionmentioning

confidence: 99%

Chemometric Optimization of the Methodology for Determination of Molybdenum in Soils and Plants by Square Wave Adsorptive Stripping Voltammetry

Carvalho

Reis

et al. 2020

J. Braz. Chem. Soc.

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The method is based on the adsorptive accumulation of complex molybdenum(VI) with 8-hydroxyquinoline, using voltammetric square wave cathodic stripping voltammetry. The composition and concentration of the supporting electrolyte, frequency (Hz), amplitude (mV) and deposition time (s), were optimized by factorial design in relation to current reduction of molybdenum(VI). The optimum methodology provided the following values for the process variables: scan increase (0.5 mV), pulse amplitude (127 mV), frequency (96 Hz), adsorption time (80 s) and drop size (0.60 mm 2), the concentration of KNO 3 (2.0 mol L-1), acetate buffer (0.5 mol L-1) and 8-hydroxyquinoline (0.01 mol L-1). The results obtained after optimization showed a linear response in the range from 1.0 to 6.0 mg L-1 and limits of detection and quantification, respectively equal to 0.02 and 0.08 mg L-1. The molybdenum contained in the samples were determined using the optimized methodology, with values consistent with the values determined by atomic emission spectrometry with inductively coupled plasma (ICP-AES).

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Fast and highly sensitive method for molybdenum(VI) determination by catalytic adsorptive stripping voltammetry

Cited by 7 publications

References 44 publications

A Simple and Sensitive Electrochemical Sensor for Chloramphenicol Detection in Pharmaceutical Samples

A Simple and Sensitive Electrochemical Sensor for Chloramphenicol Detection in Pharmaceutical Samples

Chemical Modified Carbon Paste Electrode for Potentiometric Determination of Mo(VI) and its Application in Food Analysis and Agriculture Fertilizers

Chemometric Optimization of the Methodology for Determination of Molybdenum in Soils and Plants by Square Wave Adsorptive Stripping Voltammetry

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