Decomposition of hydrogen peroxide in high-purity water has been measured at temperatures ranging 100 to 280Β°C in a laboratory test loop. A first-order decomposition kinetics has been observed in all cases, but the decomposition rates were found to vary widely, depending on the material used in the
A simple spectrophotometric determination of hydrogen peroxide at low concentrations in aqueous solution
β Scribed by Ayad N. Baga; G.R.Alastair Johnson; Najdat B. Nazhat; Rajiha A. Saadalla-Nazhat
- Publisher
- Elsevier Science
- Year
- 1988
- Tongue
- English
- Weight
- 319 KB
- Volume
- 204
- Category
- Article
- ISSN
- 0003-2670
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β¦ Synopsis
The procedure described for the determination of hydrogen peroxide in aqueous solution, at concentrations in the range 1-120X 10d6 mol l', is based on reduction of copper (II) ions by hydrogen peroxide in the presence of excess of 2,9-dimethyl-l,lO-phenanthroline (DMP) to form the copper (I) -DMP complex. The copper (I) -DMP complex is determined directly by spectrophotometric measurement at 454 nm.
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A kinetic spectrophotometric investigation of the reaction of the hydrogen peroxide anion with methyl p-nitrophenyl sulfate in methanol solvent resulted in the evaluation of the pKa of HOOH in methanol at 25'C as 15.8 f 0.2. Since normal kinetic procedures for the determination of the equilibrium co