I don't know, Ivan. My plan was to gravimetrically determine approximately the percent of particles smaller than 11 nm. From the same batch of CS, dry and weigh a sample. Then filter another sample and dry and weigh the same volume. Kinda dumb simple.
I intuitively, it seems that small samples would magnify errors, but other than that, I don't know the effect of the volume. Of course, I know I am taking a great professional risk by communicating with a mere student. Har Har. Later friend, James-Osbourne: Holmes -----Original Message----- From: Ivan Anderson [mailto:[email protected]] Sent: Friday, June 01, 2001 10:46 PM To: [email protected] Subject: RE: CS>Re[2]: CS>Measuring particle concentration of colloids James, How much do you want to filter? You can obtain syringe filters that will pass about 100mL at 10 or 20nm. Ivan. > -----Original Message----- > From: James Osbourne, Holmes [mailto:[email protected]] > Sent: Saturday, 2 June 2001 02:10 > To: [email protected] > Subject: RE: CS>Re[2]: CS>Measuring particle concentration of colloids > > > Hi Frank, > > Can you recommend a filter which will pass 10 nm Ag and smaller and stop > larger particles? > > Thanks in advance, > > James-Osbourne: Holmes > > -----Original Message----- > From: Frank Key [mailto:[email protected]] > Sent: Friday, June 01, 2001 7:05 AM > To: *Silver-List* > Subject: Re: CS>Re[2]: CS>Measuring particle concentration of colloids > > Ivan wrote: > > > The term colloidal silver as used in the popular sense refers to > > electrically generated silver solutions, which generally contain almost > 100% > > ions and certainly between 75% and 100% ions, and in a scientific sense > act > > more like solutions than colloids. > > A metal colloid refers to particles suspended, usually in water, not ions. > No particles, no colloid. > > Ions in water is an ionic solution, not a colloid. > > The fact that some non-scientific individuals call an ionic solution a > colloid does not change the definition of a colloid. A lie repeated often > enough is soon believed to be truth. > > In a scientific sense colloids do not act like solutions. > > An ionic solution cannot be separated by centrifugation, yet every colloid > can. > > An ionic solution cannot be separated by filtration, yet every > colloid can. > > The distinctions are endless, anyone who claims otherwise is > among those who > propagate the nonsense science you refer to "as used in the > popular sense". > > A larger list of the differences between ions and particles can > be found in > the table titled "Summary of Properties for Silver" at: > http://www.silver-colloids.com/Tables/tables.html frank key -- 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]>
