DPPH
From NMR Wiki
DPPH is 2,2-diphenyl-1-picrylhydrazyl, a stable free radical that can be used to calibrate field in the EPR spectromer[1], using g factor value of 2.0036+/-0.0002.
References
- Krzystek, J and Sienkiewicz, A and Pardi, L and Brunel, LC. DPPH as a Standard for High-Field EPR. Journal of Magnetic Resonance 125(1):207--211, 1997. BibTeX
