University of California publishes research in science and technology.

Ecology, Environment & Conservation | November 13, 2009 | Copyright

According to recent research published in the journal Environmental Science & Technology, "The peroxy radical chemical amplification (PERCA) method is combined with cavity ringdown spectroscopy (CRDS) to detect peroxy radicals (HO2 and RO2). In PERCA, HO2 and RO2 are first converted to NO2 via reactions with NO, and the OH and RO coproducts are recycled back to HO2 in subsequent reactions with CO and O-2; the chain reactions of HO2 are repeated and amplify the level of NO2."

"The amplified NO2 is then monitored by CRDS, a sensitive absorption technique. The ...

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