I am looking for reliable antioxidant test to be performed in extruded pet food samples. I am also looking for HPLC techniques to detect natural antioxidants (polyphenols) in extruded pet food samples.
Dear Francesco, in a recent work we demonstrated that the unconventional plant Rumex obtusifolius presents a high content of bioactive compounds and antioxidant activity ( Article Rumex obtusifolius is a wild food plant with great nutrition...
). If you desire to try, it is a rich source of polyphenols. Now we are evaluating the polyphenols profile and the toxicity.