Hydrogen Peroxide as an Intermediate in Electrocatalytic Reduction of Oxygen. A New Method for the Determination of Rate Constants

1980 ◽  
Vol 127 (9) ◽  
pp. 2003-2006 ◽  
Author(s):  
F. van den Brink ◽  
E. Barendrecht ◽  
W. Visscher
Keyword(s):  
Hydrogen Peroxide ◽  
Rate Constants ◽  
New Method ◽  
Electrocatalytic Reduction

Sensitive and simple detection of trace hydrogen peroxide based on a resonance light scattering assay

2015 ◽  
Vol 7 (20) ◽  
pp. 8750-8756 ◽  
Author(s):  
Ningli Tang ◽  
Yaqi Shan ◽  
Ronghui Zhang ◽  
Xinglong Meng
Keyword(s):  
Hydrogen Peroxide ◽  
Light Scattering ◽  
Resonance Light Scattering ◽  
Influential Factors ◽  
New Method ◽  
Reaction Conditions ◽  
Simple Detection ◽  
Optimum Reaction

A new method for the resonance light scattering determination of hydrogen peroxide has been developed, and the optimum reaction conditions, influential factors and applications were investigated.

scholarly journals New Method of Determining Kinetic Parameters for Decomposition of Hydrogen Peroxide by Catalase

Catalysts ◽  
2020 ◽  
Vol 10 (3) ◽  
pp. 323 ◽  
Author(s):  
Ilona Trawczyńska
Keyword(s):  
Hydrogen Peroxide ◽  
Rate Constant ◽  
Reaction Rate ◽  
Reaction Medium ◽  
Decomposition Reaction ◽  
Reaction Rate Constant ◽  
New Method ◽  
Kinetic Properties ◽  
Simple Method

The presented study investigates the kinetic properties of catalase during hydrogen peroxide decomposition reaction. A novel and simple method is hereby proposed for the determination of the enzyme deactivation rate constant (kd) and the decomposition of H2O2 reaction rate constant (kr). Available methods allow the kd constant to be determined only based on previously experimentally determined kr. The presented method differs from the conventional procedure. Known initial and final concentrations of hydrogen peroxide enable determination of both constants at the same time based on data from only one experiment. The correctness of the new method proposed here in determining the reaction rate constant was checked by comparing the obtained constant values with the calculated values according to the commonly used Aebi method. The method was used to analyze in detail the effect of pH (3–10) and temperature (10–45 °C) of the reaction medium on kinetic constants. The value of the constant kd increases together with the value of pH and temperature. In addition, the activation energy for decomposition reaction and deactivation reaction was found to be Er = 14 kJ mol−1 and Ed = 56.8 kJ mol−1 respectively.

scholarly journals The use of Spectroquant Merck BOD photometric test to evaluate the stabilityof organic matters in soil

2011 ◽  
Vol 51 (No. 1) ◽  
pp. 46-50
Author(s):  
L. Kolář ◽  
S. Kužel ◽  
A. Hanušová ◽  
J. Gergel ◽  
R. Ledvina ◽  
...  
Keyword(s):  
Rate Constant ◽  
Rate Constants ◽  
High Time ◽  
New Method ◽  
Dilution Method ◽  
Organic Matters ◽  
Biochemical Oxidation ◽  
Volumetric Determination ◽  
Vacuum Method

We proposed a new method to determine the rate constant of biochemical oxidation of soil organic matters that makes it possible to evaluate their stability by Spectroquant Merck BOD photometric tests; if smaller samplings are used and individual determinations are performed, it can replace the method of BOD vacuum measuring by an Oxi Top Control Merck system. The time and labour consumption of this vacuum method is sometimes criticised, but it has demonstrable work advantages for a large series of samples and so it is still recommended. The two methods are identical as for the correctness and coincidence of results and they do not differ by either lower or higher results and therefore we recommend the new method with photometric tests for smaller series of samples. For the high time and labour consumption we must warn against the use of traditional BOD dilution method with volumetric determination of oxygen for the determination of rate constants.

scholarly journals Analytical application of the reaction system phenyl fluorone-hydrogen peroxide for the kinetic determination of cobalt and tin traces by spectrophotometry in ammonia buffer media

2013 ◽  
Vol 67 (6) ◽  
pp. 989-997
Author(s):  
Sofija Rancic ◽  
Snezana Nikolic-Mandic ◽  
Aleksandar Bojic
Keyword(s):  
Hydrogen Peroxide ◽  
Reaction System ◽  
Inhibitory Effect ◽  
New Method ◽  
Kinetic Determination ◽  
Spectrophotometric Methods ◽  
Kinetic Spectrophotometric ◽  
Comparison Of The Results ◽  
Oxidation By Hydrogen Peroxide

The present paper describes two new, simple, rapid, selective and sensitive kinetic spectrophotometric methods for Co(II) and Sn(II) determination in solution at room temperature, based on their effect on phenyl fluorone (PF) oxidation by hydrogen peroxide in ammonia buffer. The new method was elaborated for nano amounts of Co(II) determination, based on its catalytic effect on the oxidation of PF by H2O2 in the presence of citric acid (CA) as an activator. Also, the new method for micro amounts of Sn(II) determination was developed based on its inhibitory effect upon the same reaction. Comparison of the results showed that the activated catalytic reaction has better sensitivity than the inhibitory one. Methods were validated by the analyze of chemical substances and results were improved by examining the same samples by AAS method.

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