--- Jed Rothwell wrote: > The heavy water content ordinary light water is usually quoted at 1:6,700 and sometimes as high as 1:5,400, and Wikipedia says it is 1:3200. That's 150, 185, or 313 ppm -- take your pick.
>I think the first estimate may be for deuterons versus protons in water, ignoring the oxygen. Semantics: there is actually much lower "heavy water" than there is H-O-D which is not heavy water per se, but has one deuteron instead of the two in heavy water - no? There seems to be some conflicting numbers floating around. The resolution probably involves whether you are comparing deuterons to protons, or the extra molecular weight 18 vs. 19 vs. 20 ? And then there is also "heavy oxygen" to further muck things up ....
