Certain features of will be down for maintenance the evening of Friday August 18th starting at 8:00 pm CDT until Saturday August 19th at 12:01 pm CDT.   Please note that you still have telephone and email access to our local offices. We apologize for any inconvenience.

Electron Spin Resonance (ESR/EPR) Spectroscopy

Electron spin resonance (ESR) or electron paramagnetic resonance spectroscopy (EPR) is a sophisticated spectroscopic technique that detects free radicals or inorganic complexes in chemical and biological systems. Generally, these radicals are unstable, but when they are first reacted with spin-trapping reagents, they can be trapped and stabilized. On the other hand, with use of a spin-labeling reagent, the molecules without radicals can also be measured with ESR/EPR.