Patent ID: 6982173

Claim:
A method for the analytical determination of peroxidic perfluoropolyether oxidizing power (PO) in peroxidic perfluoropolyethers (PFPE), comprising titrating iodine generated by oxidation of an iodide from the peroxide contained in the PFPE, in the presence of a solvent having structural formula: R 1 O—(CF 2 O) n —(CF 2 CF 2 O)) m R 2 (I) wherein: R 1 is —CH 3 or —C 2 H 5 ; R 2 is equal to R 1 or —CF 2 H; n is 0 or an integer from 1 to 100; m is an integer from 1 to 100 or, when R 2 is CF 2 H, m can also be 0; and the oxyfluoroalkylene units —(CF 2 CF 2 O)— and —(CF 2 O)— are statistically distributed along the polymer chain in substitution of 1,1,2-trichloro trifluoro ethane.