Krivit is a journalist, not an expert in mass spectrometry. Brian Ahern is one expert who believes that the case for helium is not made. There are others who are less vocal than Brian, or more circumspect in public pronouncements, but equally in doubt.
Surely you do not think that Krivit came up with this notion without plenty of ammo from real experts… From: Jed Rothwell The best evidence is the helium that turns up in PF style reactions, but there are arguments from leading experts that helium is non-existent. Which leading expert said that? Krivit? - Jed