It being generally accepted that the particle size increases with time once the ionic saturation point is reached, the visibility of a laser beam in the sol before the sol itself exhibits a yellow hue should indicate particles of a size no greater than 30nm.
Best Regards, Arnold Beland www.atlasnova.com ----- Original Message ----- From: "Marshall Dudley" <mdud...@execonn.com> To: <silver-list@eskimo.com> Sent: Tuesday, October 21, 2003 7:30 AM Subject: Re: CS>Color of silver sols > Yes, and no. If it is clear it is either below 30 or above 144, but how much > below or above is not easy to determine since the data does not go that far. > > I spent a little time with some curve fitting programs, but unfortunately > every curve fit I could find did not extrapolate at all. If I get a chance I > will see if I can determine the approximate particles size for absorption at > 300 nm, which is the lower limit of a normal person's vision. > > Marshall > > Arnold Beland wrote: > > > Thank you, Marshall, for publishing this very valuable data. May we infer > > from this that the particle size of our home made sol, if it is clear, is > > less than 40nm ? The fact that we have particles would be borne out by the > > presence of a strong beam of laser light from our laser pointer. > > Best Regards, > > Arnold Beland > > www.atlasnova.com > > ----- Original Message ----- > > From: "Marshall Dudley" <mdud...@execonn.com> > > To: <silver-list@eskimo.com> > > Sent: Monday, October 20, 2003 7:09 AM > > Subject: CS>Color of silver sols > > > > > The following information is from "Light-Scattering Submircorsopic > > > particles as > > > Highly Fluorescent Analogs and Their Use as Tracer labels in Clinical and > > > Biuological Applications" by Juan Yguerabide and Evangelina E. > > > Yguerabide, Depart > > > of biology, University of California at San Diego, La Jolla, California > > > 92093. > > > Analytical Biochemnistry 262, pages 157-176 (1998).. Articles number > > > AB982760. > > > > > > Silver Sols (colloidal silver): > > > > > > Diameter Transmission Scattered Light Absorb. wave max (nm) > > > Scattered > > > wave max > > > 38 Yellow Blue violet > > > 431 465 > > > 47 Yellow Blue > > > 440 472 > > > 60 Yellow Light Blue > > > 449 474 > > > 75 Gold Green Blue 465 > > > 90 Pink Yellow > > > 488 572 > > > 118 Pink Yellow > > > 527 575 > > > 144 Brown Pale Yellow > > > 575 590 > > > > > > This will be followed by 3 emails. > > > > > > 1. Silver spectral absortion for silver sols, unnormalized > > > 2. Silver spectral absorption for silver sols, smaller particles > > > normalized. > > > 3. Gold spectral absorption for gold sols, normalized. > > > > > > Marshall > > > > > > > > > -- > > > The silver-list is a moderated forum for discussion of colloidal silver. > > > > > > Instructions for unsubscribing may be found at: http://silverlist.org > > > > > > To post, address your message to: silver-list@eskimo.com > > > > > > Silver-list archive: http://escribe.com/health/thesilverlist/index.html > > > > > > List maintainer: Mike Devour <mdev...@eskimo.com> > > > > --- > > Outgoing mail is certified Virus Free. > > Checked by AVG anti-virus system (http://www.grisoft.com). > > Version: 6.0.524 / Virus Database: 321 - Release Date: 10/8/2003 --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.524 / Virus Database: 321 - Release Date: 10/9/2003
