Determination of Diazinon in fruit samples using electrochemical sensor based on carbon nanotubes modified carbon paste electrode

zahirifar, Fatemeh; Rahimnejad, Mostafa; Abdulkareem, Rafid A.; Najafpour, Ghasem

doi:10.1016/j.bcab.2019.101245

Cited by 38 publications

(14 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Nanomaterials decrease the resistance and increase the surface area of the electrode, leading to a significant performance enhancement [15]. Recently, multi-walled carbon nanotubes (MWCNTs) have become among the most extensively utilized nanomaterials to enhance the electroanalytical performance of many chemically modified electrodes [16,17]. MWCNTs are composed of sp 2 carbon units having several layers of graphite sheets, with distinctively exceptional electrical, electronic, mechanical, and chemical characteristics [2].…”

Section: Introductionmentioning

confidence: 99%

Direct analysis of thorium(IV) ions concentration in water samples using a new carbon paste electrode

Akl

Ali

2022

J IRAN CHEM SOC

View full text Add to dashboard Cite

The radioactive and hazardous nature of thorium demands the fabrication of efficient electrodes for its sensitive and selective monitoring in aqueous environments. The present paper reports the construction and characterization of a new carbon paste electrode (CPE) chemically modified by octyl phenyl acid phosphate (OPAP) as a selective recognition agent for the potentiometric assay of thorium(IV) ions. Improved sensitivity, electrical conductivity, and selectivity were achieved by incorporating oxidized multi-walled carbon nanotubes (o-MWCNTs) into the carbon paste composition. The electrochemical performance of the developed electrode was evaluated regarding the paste ingredients, response time, and working pH range. The standard CPE potentials, E°, were determined at various temperatures and the isothermal temperature coefficient was calculated. The optimized CPE showed a Nernstian slope of 14.65 ± 0.38 mV decade−1 over the concentration range of 4.82 × 10–7–1.00 × 10–1 mol L−1. The electrode possessed a short response time (9 s), independence of the solution pH over the range of 2.5–5.5, and a relatively long operational lifetime (˃ 3 months). The selectivity coefficients indicated the good discrimination ability of the developed CPE towards thorium(IV) ion compared to various common ions. Aiming to judge the practical utility of the developed CPE, it was successfully used for the potentiometric analysis of thorium(IV) ions in various real aqueous matrices with sensible results.

show abstract

Section: Introductionmentioning

confidence: 99%

Direct analysis of thorium(IV) ions concentration in water samples using a new carbon paste electrode

Akl

Ali

2022

J IRAN CHEM SOC

View full text Add to dashboard Cite

show abstract

“…It allows to significantly improve their sensitivity and lower a limit of detection. In recent years, different groups of material have been used as modifiers of GCE and CPE; among them were, for example, carbon nanomaterials (carbon black [22], carbon nanotubes [23], graphene [24]), metals (Au [25], Ni [26]), metal oxides (CeO 2 [27], Fe 2 O 3 [28]), or conductive polymers (PEDOT [29], polyaniline [30]). Hybrid materials consisted of 2 or more different substances have become also popular.…”

Section: Introductionmentioning

confidence: 99%

Nimesulide Determination on Carbon Black-Nafion Modified Glassy Carbon Electrode by Means of Adsorptive Stripping Voltammetry

et al. 2021

View full text Add to dashboard Cite

Adsorptive Stripping Voltammetric method for Nimesulide (NIM) determination was developed. As a working electrode, glassy carbon electrode (GCE) modified with carbon black and Nafion (CB-Nafion GCE) was used. All measurements were carried out in 0.1 M acetate buffer (pH 4.6). Conducted experiments allowed to optimize differential pulse voltammetry (DPV) instrumental parameters: sampling and waiting time ts = tw = 10 ms, step potential Es = 4 mV, and pulse amplitude ΔE = 50 mV. The best results were obtained for preconcentration potential and time equal to 400 mV and 20 s, respectively. Limit of detection was calculated and was equal to 0.14 µM for 20-s preconcentration time and 0.06 µM for 40-s preconcentration time. In order to prove the applicability of the developed method, concentration of nimesulide in pharmaceutical products was determined. Calculated recoveries were in the range 94–99%, which indicates that the method might be assumed as accurate. Coefficient of variation was equal to 5.0% (n = 7, NIM concentration 1 µM) Obtained results of NIM determination were in good agreement with the content declared by producers.

show abstract

“…Cleanup and preconcentration processes for trace analysis, due to the complexity of matrix and low amount of analyte, are essential. Various sample preparation techniques such as solid-phase extraction (SPE) and micro-solidphase extraction (µ-SPE) [20][21][22], liquid-liquid extraction (LLE), and liquid-liquid microextraction (LLME) [23][24][25][26], magnetic solid-phase extraction followed by dispersive liquid-liquid microextraction (DLLME) [27], matrix solidphase dispersion (MSPD) [28], pressurized liquid extraction (PLE) [29], and electrochemical methods were reported for the determination of diazinon in different matrices [30,31]. SPE is an effective technique for the selective isolation and concentration of a wide range of analytes and sample matrices.…”

Section: Introductionmentioning

confidence: 99%

Determination of diazinon in water and food samples using magnetic solid‐phase extraction coupled with liquid chromatography

Mohammadnia

Heydari

Sohrabi

et al. 2020

Separation Science Plus

View full text Add to dashboard Cite

In the present study, a dispersive micro‐solid phase extraction method using magnetic graphene oxide/vancomycin nanocomposite as sorbent coupled with high‐performance liquid chromatography was developed for determining diazinon in water and food samples. The sorbent was characterized by various techniques such as Fourier‐transform infrared spectroscopy, X‐ray diffraction, scanning electron microscopy–energy dispersive spectroscopy, thermal gravimetric analysis, and Brunauer–Emmett–Teller surface area analysis. Influential parameters on the extraction efficiency of diazinon using dispersive micro‐solid phase extraction such as sorbent and its amount, elution solvent and its volume, adsorption and desorption times, and pH of sample solution were investigated and optimized. Under the optimized conditions, method detection limit and limit of quantitation values were 0.001 and 0.003 µg/mL, respectively. Relative recovery data for several real samples were obtained within the range of 85.0–102.0% with a relative standard deviation <7.5%. Intraday and interday relative standard deviation values were <5.2 and <7.5, respectively. The proposed method was successfully applied to quantitative determination of diazinon in several water and food samples.

show abstract

Determination of Diazinon in fruit samples using electrochemical sensor based on carbon nanotubes modified carbon paste electrode

Cited by 38 publications

References 24 publications

Direct analysis of thorium(IV) ions concentration in water samples using a new carbon paste electrode

Direct analysis of thorium(IV) ions concentration in water samples using a new carbon paste electrode

Nimesulide Determination on Carbon Black-Nafion Modified Glassy Carbon Electrode by Means of Adsorptive Stripping Voltammetry

Determination of diazinon in water and food samples using magnetic solid‐phase extraction coupled with liquid chromatography

Contact Info

Product

Resources

About