Quantitative EPR

From NMR Wiki

TEMPOL dissolved in water was proposed[1] as a primary standard for determination of concentration of free radical species by EPR. The proposed method recommends determining concentraion of TEMPOL by measurement of absorbance at 436.68 nm and using molar absorptivity of 13.2&plusminus;0.1 LM^-1cm^-1.

References

1. Yordanov, ND and Ranguelova, K. Quantitative electron paramagnetic resonance and spectrophotometric determination of the free radical 4-hydroxy-2, 2, 6, 6-tetramethylpiperidinyloxy. Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy 56(2):373--378, 2000. BibTeX [yordanov]