Hydrogen peroxide decay

The chain mechanism of hydrogen peroxide decay under catalytic action of transition metal ions was postulated F. Haber and J. Weiss [62]... 

Figure 5. Hydrogen peroxide decay rate constants in surface-water samples from Sharpes Bay (in June and September), Jacks Lake, Ontario, Canada, from the East (Station 23), Central (Station 84), and West Basin (Station 357) of Lake Erie and the Chesapeake Bay, plotted as a function of bacteria...

Table VI. Hydrogen Peroxide Decay in Surface-Water Samples in the Upper...

Goethite (a-FeOOH) has also been studied as a potential Fenton-like catalyst [50]. Hydrogen peroxide decay over goethite exhibited second-order... 

Hydrogen peroxide decay in cyclohexanol oxidation occurs by several routes, (a) By reaction with hydroxycyclohexyl radicals [57]... 

The oxygen dissolved in the plastic reacts with the alkyl radicals under formation of peroxide radicals ROO and leads to additional hydrogen peroxides and new alkyl radicals (s. Fig. 1.13). These hydrogen peroxides decay rapidly to alkoxy and hydroxy radicals at typical processing temperatures of 180 to above 300 °C [38]. 

The study of the chemical behavior of concentrated preparations of short-Hved isotopes is compHcated by the rapid production of hydrogen peroxide ia aqueous solutions and the destmction of crystal lattices ia soHd compounds. These effects are brought about by heavy recoils of high energy alpha particles released ia the decay process. 

The first detailed investigation of the reaction kinetics was reported in 1984 (68). The reaction of bis(pentachlorophenyl) oxalate [1173-75-7] (PCPO) and hydrogen peroxide cataly2ed by sodium saUcylate in chlorobenzene produced chemiluminescence from diphenylamine (DPA) as a simple time—intensity profile from which a chemiluminescence decay rate constant could be determined. These studies demonstrated a first-order dependence for both PCPO and hydrogen peroxide and a zero-order dependence on the fluorescer in accord with an earher study (9). Furthermore, the chemiluminescence quantum efficiencies Qc) are dependent on the ease of oxidation of the fluorescer, an unstable, short-hved intermediate (r = 0.5 /is) serves as the chemical activator, and such a short-hved species "is not consistent with attempts to identify a relatively stable dioxetane as the intermediate" (68). 

Based on the analytical figures of merit of the methods in Table 1, the best precision and selectivity are accomplished by using the decay rate rather than the formation rate or conventional CL-measured parameters such as the peak height or area under the CL curve. Table 2 gives the selectivity factor, expressed as decay-rate and peak-height tolerated concentration ratio, for the CL determination of hydrogen peroxide using SF-CLS. As can be seen, the selectivity factor was quite favorable in most instances. 

Highley T. Effect of carbohydrate and nitrogen on hydrogen peroxide formation by wood decay fungi in solid medium. FEMS Microbiol Lett 1987 48 373-378. 

Micales JA, Highley TL. In vitro production of hydrogen peroxide by degradative andnon-degradative isolates ofbrown-rot wood decay fungi. Phytopathology 1989 77 988. 

The majority of investigators found the reaction to be first order in hydrogen peroxide. Accordingly, the decay of H202 can be described formally by the rate law... 

Table V, Hydrogen Peroxide Profile and Decay at Two Stations in the Chesapeake Bay...

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