W. Ciesielski et al., THE TRIFLUOROACETIC ANHYDRIDE-SODIUM IODIDE SYSTEM AS A REAGENT FOR DETERMINATION AND MICRODETERMINATION OF NITROXIDE RADICALS, Talanta, 42(4), 1995, pp. 519-526
A trifluoroacetic anhydride-sodium iodide mixture (TFAA-I) reacts with
nitroxide radicals with liberation of iodine. Since stoichiometric am
ounts of iodine are formed from nitroxides, the TFAA-I reagent can be
applied to their analytical determination. Two procedures for the dete
rmination of nitroxides (titrimetric on mu mol and spectrometric on nm
ol levels) are described.