Homogeneous mechanism of ascorbic acid interference in hydrogen peroxide detection at enzyme-modified electrodes

This work reports the use of metallo tetra-amino phthalocyanines ( MTAPc, M = Co and Mn ) polymer thin films on gold and glassy carbon electrode surfaces for the detection and monitoring of hydrogen peroxide ( H2O2 ). The polymer-modified electrodes were characterized using electrochemical and microscopic-based methods. Atomic force microscopy (AFM) was used to study the bare and polymer-modified ITO surfaces. The electrocatalytic reduction of H2O2 with glassy carbon polymer-modified electrodes gave higher current densities compared to their gold counterparts. The electroanalytical properties of H2O2 were obtained using a real-time calibration curve of the amperometric determination in pH 7.4 aqueous solution. The limits of detection (LoD) of the polymer-modified electrodes towards electroreduction of H2O2 were of the order of 10–7 M, with high sensitivity ranging from 6.0–15.4 mA.mM-1.cm-2.

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Characterization of Glucose Oxidase-Modified Poly(phenylenediamine)-Coated Electrodes in vitro and in vivo: Homogeneous Interference by Ascorbic Acid in Hydrogen Peroxide Detection

Analytical Chemistry ◽

10.1021/ac00082a025 ◽

1994 ◽

Vol 66 (10) ◽

pp. 1754-1761 ◽

Cited By ~ 135

Author(s):

John P. Lowry ◽

Karl. McAteer ◽

Satea S. El Atrash ◽

Adrienne. Duff ◽

Robert D. O'Neill

Keyword(s):

Hydrogen Peroxide ◽

Ascorbic Acid ◽

Glucose Oxidase ◽

Hydrogen Peroxide Detection ◽

Coated Electrodes

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Dispersion of single walled carbon nanotubes. Comparison of different dispersing strategies for preparation of modified electrodes toward hydrogen peroxide detection

Electrochemistry Communications ◽

10.1016/j.elecom.2006.03.028 ◽

2006 ◽

Vol 8 (5) ◽

pp. 899-903 ◽

Cited By ~ 70

Author(s):

J TKAC ◽

T RUZGAS

Keyword(s):

Carbon Nanotubes ◽

Hydrogen Peroxide ◽

Modified Electrodes ◽

Single Walled Carbon Nanotubes ◽

Single Walled Carbon ◽

Hydrogen Peroxide Detection ◽

Walled Carbon Nanotubes

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Synthesis and Characterization of Silver Nanoplates by a Seed-mediated Method

Communications in Physics ◽

10.15625/0868-3166/29/3/13763 ◽

2019 ◽

Vol 29 (3) ◽

Author(s):

Mai Ngọc Tuan Anh

Keyword(s):

Hydrogen Peroxide ◽

Silver Nanoparticles ◽

Ascorbic Acid ◽

Silver Nitrate ◽

Sodium Borohydride ◽

Trisodium Citrate ◽

Synthesis And Characterization ◽

Silver Nanoplates ◽

Seed Mediated

Silver nanoplates (SNPs) having different size were synthesized by a seed-mediated method. The seeds -silver nanoparticles with 4 – 6 nm diameters were synthesized first by reducing silver nitrate with sodium borohydride in the present of Trisodium Citrate and Hydrogen peroxide. Then these seeds were developed by continue reducing Ag\(^+\) ions with various amount of L-Ascorbic acid to form SNPs. Our analysis showed that the concentratrion of L-Ascorbic acid, a secondary reducing agent, played an important role to form SNPs. In addition, the size and in-plane dipole plasmon resonance wavelenght of silver nanoplates were increased when the concentration of added silver nitrate increased. The characterization of SNPs were studied by UV-Vis, FE-SEM, EDS and TEM methods.

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