In this paper, the ESR (electron spin resonance) spectra of gold bearing quartz and pyrite have been systematically studied by means of JES FE1XG model ESR spectrometer.

METHODS The reaction product and free radical intermediate in the reaction medium with or without antioxidants and other moderators was detected by spectrophotometry and electron spin resonance(ESR).

The scavenging effect of selenium on peroxy radical was directly investigated with two kinds of selenium compound by means of electron spin resonance (ESR) technique.