Frank, Thanks for that. Another question. Would not the large percentage of ions to particles have an effect upon the Zeta potential measurement, and if so, would this not affect this and therefore also the particle size determination?
Ivan. ----- Original Message ----- From: "Frank Key" <[email protected]> To: <[email protected]> Sent: Thursday, 29 March 2001 15:07 Subject: Re: CS>Commercial Product Reports > Ivan wrote: > > > Very nice Frank! > > > > I presume the particle sizing is performed on the non-ionic percentage > > of the samples. Do you separate the sample before performing the sizing? > > The sample that is tested for particle size is directly out of the bottle. > Since ions are dissolved, they do not scatter laser light and so are not seen > by the PCS. > > The particles are removed by 350,000 G-force centrifugation. After the > particles are removed the AAS is used to measure the remaining ions, thus > determining ionic content. > > > It might be worth noting in your introduction that the particle size > > relates only to the small percentage that is not ionic. > > Since a PCS only sees particles since ions do not scatter light. > > The zeta potential sample is also directly out of the bottle. > > > frank key --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.240 / Virus Database: 116 - Release Date: 23/03/2001 -- 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]>
