Electrochemical determination diethylstilbestrol by a single-walled carbon nanotube/platinum nanoparticle composite film electrode

Fei, Junjie; Xi, Wen; Yi, Lanhua; Ge, Fang; Zhang, Ying; Huang, Meihua; Chen, Xiaoming

doi:10.1007/s10800-008-9597-0

Cited by 26 publications

(6 citation statements)

References 22 publications

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“…Due to their unique structure, CNTs can behave electrically as a metal or as a semiconductor. The subtle electronic behavior of CNTs reveals that they have the ability to promote electron-transfer reactions, when they are used as an electrode material in electrochemical reactions [3]. CNTs are molecular-scale wires with high electrical conductivity, extremely high mechanical strength and modulus, and can be divided into two categories: singlewall carbon nanotubes (SWCNTs) and multi-walled carbon nanotubes (MWCNTs).…”

Section: Introductionmentioning

confidence: 99%

Electrochemical determination of ascorbic acid at the surface of a graphite electrode modified with multi-walled carbon nanotubes/tetradecyltrimethylammonium bromide

et al. 2010

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A multi-walled carbon nanotubes (MWCNTs)-tetradecyltrimethylammonium bromide (TTAB) filmcoated graphite electrode (GE) was fabricated, and the electrochemical oxidation of ascorbic acid (AA) was studied in Britton-Robinson (B-R) buffer (pH 7.0) using cyclic, square wave, and differential pulse voltammetry (CV, SWV, and DPV). An electroanalytical study of AA and acetaminophen (ACOP) and of several mixtures of these compounds in different ratios was made. A sensitive linear voltammetric response for AA was obtained for the concentration range of 5 9 10 -7 to 1.7 9 10 -4 mol L -1 , with a correlation coefficient of 0.992, and the detection limit for AA was found to be 1.1 9 10 -7 mol L -1 using DPV. The relative standard deviation (RSD) was 2.7%, suggesting that the film electrode has excellent day-to-day reproducibility. The proposed voltammetric approach was also applied to the determination of the AA concentration in commercial tablets.

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Section: Introductionmentioning

confidence: 99%

Electrochemical determination of ascorbic acid at the surface of a graphite electrode modified with multi-walled carbon nanotubes/tetradecyltrimethylammonium bromide

et al. 2010

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“…However, the main problems associated with the use of sample preconcentration for the determination of DES are the lack of selectivity and the low recovery. To date, chemically modified electrodes have been applied for detection of DES [15][16][17][18][19]. They are low-cost and usually do not require time consuming sample preparation.…”

Section: Electrochemical Properties Of Des At the Gr/gcementioning

confidence: 99%

Study of Dna-Diethylstilboestrol Interaction Using Graphene-Based Thin-Film Sensor and Uv-Vis Spectroscopy

Chen

et al. 2018

J. Chil. Chem. Soc.

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The graphene-modified glassy carbon electrode (Gr/GCE) was fabricated by casting graphene (Gr). Some electrochemical parameters for diethylstilbestrol (DES) detection, such as pH, scan rate, and accumulation time were discussed. The interaction of DES with DNA at a Gr/GCE was studied by electrochemical method and factors influencing the interaction were optimized. Under the optimized conditions, the results revealed that the peak current decreased and the peak potential shifted to the positive side after adding DNA into the solution containing DES. We deduced that the interaction of DES with DNA mainly is intercalation. The interaction of DES with DNA was studied by ultraviolet and visible (UV-Vis) absorption spectroscopy. Also, with the addition of DNA, hyperchromic effect and small red shifts were observed in its UV-VIS spectra upon addition of DNA, results indicated that the DES molecule intercalated into the DNA, and the complex of DES-DNA was formed.

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“…Some researchers have already pointed out problems associated with DES adsorption which leads to low sensitivity and irreproducibility for its detection [14] . Among them, some have used surfactants in solution to prohibit the electron exchange between DES and the electrode, and block its adsorption [14b, 15]. Regarding to Aragão et al.…”

Section: Introductionmentioning

confidence: 99%

A Better Understanding of Diethylstilbestrol Electro‐oxidation: Towards the Design of an Electrochemical Sensor

Bibani

Ktari²,

Fourati

et al. 2020

Electroanalysis

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The obstacle for the development of a reliable electrochemical technique to trace diethylstilbestrol (DES) lies in the complex electrochemical behavior of this illicit hormone. The present study targeted to thoroughly investigate and understand the electro‐oxidation of DES in acetonitrile on gold electrode by cyclic voltammetry (CV) and square wave voltammetry (SWV) techniques. DES voltammogram has shown two anodic peaks, implicating two successive and irreversible processes. Adsorption and diffusion properties were studied and characterized using electrochemical, spectroscopic and morphological techniques. Avoiding adsorption, and under diffusion process only, a good linear correlation between peak current and DES concentration in the range of 0.25 to 1000 μmol/L was obtained with a detection and quantification limits of 0.2 μmol/L and 0.7 μmol/L, respectively, and a sensitivity of 0.016 A/mM. Competitivity tests, between DES and its structural analog hexestrol (HS), were carried out by chronoamperometry and SWV. HS even added in excess was found to merely affect DES electrochemical measurement. The established method exhibited high precision and reproducibility, and allows the easy and successful determination of DES in poultry feed sample. With a deep insight into its complex electrochemical behavior, this work paves the way to the development of selective, sensitive and easy‐to‐use electrochemical sensors directed towards this synthetic hormone and the related chemicals such as phenolic compounds.

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Electrochemical determination diethylstilbestrol by a single-walled carbon nanotube/platinum nanoparticle composite film electrode

Cited by 26 publications

References 22 publications

Electrochemical determination of ascorbic acid at the surface of a graphite electrode modified with multi-walled carbon nanotubes/tetradecyltrimethylammonium bromide

Electrochemical determination of ascorbic acid at the surface of a graphite electrode modified with multi-walled carbon nanotubes/tetradecyltrimethylammonium bromide

Study of Dna-Diethylstilboestrol Interaction Using Graphene-Based Thin-Film Sensor and Uv-Vis Spectroscopy

A Better Understanding of Diethylstilbestrol Electro‐oxidation: Towards the Design of an Electrochemical Sensor

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