Monitoring of 2-butanone using a Ag–Cu bimetallic alloy nanoscale electrochemical sensor

Background:: new and selective electrochemical sensor was developed for the determination of levocetirizine dihydrochloride, which is an antihistaminic drug. Method:: The investigation was performed by using cyclic, differential pulse and square wave voltammetric methods on the β-cyclodextrin modified glassy carbon electrode. It is thereby planned to obtain information about levocetirizine determination and its mechanism. Result:: The efficiency of experimental parameters including pH, scan rate, and accumulation potential and time on the anodic response of levocetirizine dihydrochloride was studied. By employing the developed method and under optimized conditions, the current showed linear dependence with a concentration in the range between 2 × 10-8 M and 6 × 10-6 M in pH 2.0 Britton Robinson (BR) buffer. Conclusion:: The achieved limits of detection and quantification were found as 3.73 × 10-10 M and 1.24 × 10-9 M, respectively. In addition, the possibility of applying the developed sensor for real sample analysis was investigated, so β-cyclodextrin modified glassy carbon electrode was used to determine levocetirizine dihydrochloride in Xyzal® tablet dosage form. Finally, this sensor was successfully applied to the real sample as a selective, simple, reproducible, repeatable electrochemical sensor.

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A new electrochemical sensor based on oxidized capsaicin/multi-walled carbon nanotubes/glassy carbon electrode for the quantification of dopamine, epinephrine, and xanthurenic, ascorbic and uric acids

Journal of Electroanalytical Chemistry ◽

10.1016/j.jelechem.2020.114919 ◽

2021 ◽

Vol 881 ◽

pp. 114919

Author(s):

Leonardo Vieira da Silva ◽

Nicholas D. dos Santos ◽

Andresa K.A. de Almeida ◽

Dave Di E.R. dos Santos ◽

Ana Caroline Ferreira Santos ◽

...

Keyword(s):

Carbon Nanotubes ◽

Electrochemical Sensor ◽

Glassy Carbon Electrode ◽

Glassy Carbon ◽

Carbon Electrode ◽

Multi Walled Carbon Nanotubes ◽

Walled Carbon Nanotubes

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Electrochemical Determination of Capsaicinoids Content in Soy Sauce and Pot-Roast Meat Products Based on Glassy Carbon Electrode Modified with Β-Cyclodextrin/Carboxylated Multi-Wall Carbon Nanotubes

Foods ◽

10.3390/foods10081743 ◽

2021 ◽

Vol 10 (8) ◽

pp. 1743

Author(s):

Qianhui Gu ◽

Chaoqun Lu ◽

Kangwen Chen ◽

Xingguang Chen ◽

Pengfei Ma ◽

...

Keyword(s):

Carbon Nanotubes ◽

Electrochemical Sensor ◽

Glassy Carbon Electrode ◽

Glassy Carbon ◽

Meat Products ◽

Soy Sauce ◽

Relative Dispersion ◽

Carbon Electrode ◽

Trace Detection ◽

Multi Wall Carbon Nanotubes

The rapid quantification of capsaicinoids content is very important for the standardization of pungent taste degree and flavor control of soy sauce and pot-roast meat products. To rapidly quantify the capsaicinoids content in soy sauce and pot-roast meat products, an electrochemical sensor based on β-cyclodextrin/carboxylated multi-wall carbon nanotubes was constructed and the adsorptive stripping voltammetry method was used to enrich samples in this study. The results showed that the excellent performance of the established electrochemical sensor was mostly because β-cyclodextrin caused the relative dispersion of carboxylated multi-wall carbon nanotubes on the glassy carbon electrode surface. Capsaicin and dihydrocapsaicin had similar electrochemical behavior, so the proposed method could determine the total content of capsaicinoids. The linearity of capsaicinoids content was from 0.5 to 100 μmol/L and the detection limit was 0.27 μmol/L. The recovery rates of different capsaicinoids content were between 83.20% and 136.26%, indicating the proposed sensor could realize trace detection of capsaicinoids content in sauce and pot-roast meat products. This work provides a research basis for pungent taste degree standardization and flavor control in the food industry.

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Highly sensitive detection of hesperidin using AuNPs/rGO modified glassy carbon electrode

The Analyst ◽

10.1039/c7an01706e ◽

2018 ◽

Vol 143 (1) ◽

pp. 297-303 ◽

Cited By ~ 9

Author(s):

Yang Gao ◽

Xiufeng Wu ◽

Hui Wang ◽

Wenbo Lu ◽

Mandong Guo

Keyword(s):

Gold Nanoparticles ◽

Graphene Oxide ◽

Electrochemical Sensor ◽

Glassy Carbon Electrode ◽

Glassy Carbon ◽

Carbon Electrode ◽

Modified Glassy Carbon Electrode ◽

Reduced Graphene ◽

Highly Sensitive ◽

Highly Sensitive Detection

The highly sensitive and selective electrochemical sensor of hesperidin based on gold nanoparticles (AuNPs) and reduced graphene oxide (rGO) modified glassy carbon electrode (GCE) is reported.

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