scholarly journals Voltammetric analysis of Dopamine in the Presence of Large Concentration of Ascorbic Acid at Nickel Oxide-Gold Nanoparticles Binary Electrocatalyst

2020 ◽  
pp. 5860-5877
Author(s):  
Zahrah T. Al-thagafi ◽  
Keyword(s):  
Gold Nanoparticles ◽  
Ascorbic Acid ◽  
Nickel Oxide ◽  
Large Concentration ◽  
Voltammetric Analysis

Molecularly Imprinted Sensor for Ascorbic Acid Based on Gold Nanoparticles and Multiwalled Carbon Nanotubes

2020 ◽  
Vol 16 (7) ◽  
pp. 905-913
Author(s):  
Youyuan Peng ◽  
Qingshan Miao
Keyword(s):  
Carbon Nanotubes ◽  
Gold Nanoparticles ◽  
Ascorbic Acid ◽  
Multiwalled Carbon Nanotubes ◽  
Ph Value ◽  
Biological Fluids ◽  
Water Soluble ◽  
Multiwalled Carbon ◽  
Experimental Conditions ◽  
Molecularly Imprinted

Background: L-Ascorbic acid (AA) is a kind of water soluble vitamin, which is mainly present in fruits, vegetables and biological fluids. As a low cost antioxidant and effective scavenger of free radicals, AA may help to prevent diseases such as cancer and Parkinson’s disease. Owing to its role in the biological metabolism, AA has also been utilized for the therapy of mental illness, common cold and for improving the immunity. Therefore, it is very necessary and urgent to develop a simple, rapid and selective strategy for the detection of AA in various samples. Methods: The molecularly imprinted poly(o-phenylenediamine) (PoPD) film was prepared for the analysis of L-ascorbic acid (AA) on gold nanoparticles (AuNPs) - multiwalled carbon nanotubes (MWCNTs) modified glass carbon electrode (GCE) by electropolymerization of o-phenylenediamine (oPD) and AA. Experimental parameters including pH value of running buffer and scan rates were optimized. Scanning electron microscope (SEM), fourier-transform infrared (FTIR) spectra, cyclic voltammetry (CV) and differential pulse voltammetry (DPV) were utilized for the characterization of the imprinted polymer film. Results: Under the selected experimental conditions, the DPV peak currents of AA exhibit two distinct linear responses ranging from 0.01 to 2 μmol L-1 and 2 to 100 μmol L-1 towards the concentrations of AA, and the detection limit was 2 nmol L-1 (S/N=3). Conclusion: The proposed electrochemical sensor possesses excellent selectivity for AA, along with good reproducibility and stability. The results obtained from the analysis of AA in real samples demonstrated the applicability of the proposed sensor to practical analysis.

Gold Nanoparticles Modified Titania Nanotube Arrays for Amperometric Determination of Ascorbic Acid

2010 ◽  
Vol 43 (18) ◽  
pp. 2809-2822 ◽  
Author(s):  
T. G. Satheesh Babu ◽  
P. V. Suneesh ◽  
T. Ramachandran ◽  
Bipin Nair
Keyword(s):  
Gold Nanoparticles ◽  
Ascorbic Acid ◽  
Nanotube Arrays ◽  
Amperometric Determination ◽  
Titania Nanotube Arrays ◽  
Titania Nanotube

Gold Nanoparticles Formation via Au(III) Complex Ions Reduction with l -Ascorbic Acid

2017 ◽  
Vol 49 (11) ◽  
pp. 789-797 ◽  
Author(s):  
M. Luty-Błocho ◽  
M. Wojnicki ◽  
K. Fitzner
Keyword(s):  
Gold Nanoparticles ◽  
Ascorbic Acid ◽  
Complex Ions

Determination of ascorbic acid in serum samples by screen-printed carbon electrodes modified with gold nanoparticles

Talanta ◽  
2017 ◽  
Vol 174 ◽  
pp. 733-737 ◽  
Author(s):  
M. Asunción Alonso-Lomillo ◽  
Olga Domínguez-Renedo ◽  
Abraham Saldaña-Botín ◽  
M. Julia Arcos-Martínez
Keyword(s):  
Gold Nanoparticles ◽  
Ascorbic Acid ◽  
Carbon Electrodes ◽  
Serum Samples ◽  
Screen Printed

Interaction of gold nanoparticles with free radicals and their role in enhancing the scavenging activity of ascorbic acid

2016 ◽  
Vol 161 ◽  
pp. 266-272 ◽  
Author(s):  
Humaira Razzaq ◽  
Farhat Saira ◽  
Azra Yaqub ◽  
Rumana Qureshi ◽  
Misbah Mumtaz ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Ascorbic Acid ◽  
Free Radicals ◽  
Scavenging Activity
Sign in / Sign up

Export Citation Format

Share Document