Yes. I don't recall which
juice vendor it was. But, I emailed them asking if their liquids had diketones. Their answer was that they don't incorporate them. But, nor would they claim they were free of them, since they believed that there were various testing methods/techniques which didn't result in the same conclusions, and thus would not in good conscience make any claims one way or the other. I'm not a chemist, so can't scientifically rebut them. On the other hand, a test from a reputable lab would be worth something, IMHO.