Peracids and peroxides

Peracids and peroxides are also used as oxidizing reagents, but the most characteristic feature is that the presence of at least one heteroatom (or functional group) on silicon is essential for performing the oxidation. 

The organic peracids and peroxides are produced by the same chemistry which forms the PANs and the alkyl nitrates the alkyl nitrates and PANs are formed from peroxyacyl radicals (RCO3) and peroxy radicals (RO2) under high-NOx conditions, whereas the peracids and peroxides are formed under low-NO conditions through reactions with hydroperoxy radical ... 

With a Henry s law constant of 1 X 10 atm , H, , is quite water soluble, as compared to the relatively insoluble PANs (Hpan = 5 M atm ). Organic peracids and peroxides have intermediate water solubilities of 3 X 10 to 8 X 10 atm . The peracids and peroxides can... 

The organic peracids and peroxides are important oxidants in the atmosphere. These are responsible for the formation of H2SO4 in the aqueous phase and are thought to have toxic effects on plants. They function as reservoirs for the peroxy radicals and reflect the radical levels of the atmosphere. The organic peracids and peroxides should be given serious attention, especially as we begin to control NOx emission levels in an attempt to reduce urban and regional O3 levels. 

Nearly all techniques used for the determination of the organic peracids and peroxides employ sampling devices which collect the sample in aqueous solution prior to analysis. Such sampling... 

All of the sample collection methods suffer from inlet losses, as the reactive organic peracids and peroxides tend to decompose on unconditioned surfaces. Aerosols deposited in samphng hnes can also react with the peroxides, with subsequent loss of sample. For this reason, sample lines must be kept clean and as short as possible. A surfaceless intake scmbber has been designed to avoid surface loss. This system minimizes surface contact of the sample by eliminating all surfaces at the intake. 

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