I have yet to hear how the spent “fuel” of the e-cat could contain about 11% iron unless this was part of the secret “catalyst”.That's because it's MAGIC!!!
Seriously, Rossi claimed at one point that he was getting "unnatural" isotope ratios out of his E-Cat, but it has been reported (in one of the Rossi-supporting web sites) that the Swedish analysis stated that only natural isotope rations existed in the spent fuel.
This is one case where we have a testable set of statements. Artificial isotopes are very expensive, and it is questionable that a con artist would go to the trouble of acquiring some just to "salt" his sample. (It would also put Rossi at risk of exposing his fraud, if a supplier of such isotopes were to report that he was buying just those isotopes that later showed up in his sample.)
Rossi apparently has a legitimate analysis of his spent "fuel". All he has to do is authorize the lab to release the test results. The fact that he won't do so is yet another fact that seems strange if he's legit, but makes complete sense if he's a fraud.
Very curious.