Frank Key wrote: > Roger wrote: > > > Frank: What assurance can you provide that even at a 350,000 G-force that > > ALL > > particles in the, say, 2-25 atom range have been separated? Roger > > There is no absolutely fool proof way to be certain. We have looked at the > solution after centrifugation with the PCS and it finds no particles. > > We know that the 30,000 G-forces will get particles down to about 12 nm. At > 100,000 G-forces we can find no particles at 2 nm. We therefore deduce that > 350,000 G's has a high probability of getting it all.
A 2 nm silver particle can contain up to about 8,000 atoms of silver (if it is cubic) and somewhat less if it is spherical. I would assume you could make an educated guess that 350,000 would remove particles down to 8,000/3.5 = 2285 atoms. That works out to be particles of about 1.3 nm cubic. (This works out for spherical as well, since pi and 4/3 drop out of the equation for the ratio). So I am still not convinced that the centrifuge will remove small particles of .2 to 1 nm for example. Marshall -- The silver-list is a moderated forum for discussion of colloidal silver. To join or quit silver-list or silver-digest send an e-mail message to: [email protected] -or- [email protected] with the word subscribe or unsubscribe in the SUBJECT line. To post, address your message to: [email protected] Silver-list archive: http://escribe.com/health/thesilverlist/index.html List maintainer: Mike Devour <[email protected]>
