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" <[email protected]> > To: <[email protected]> > 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: [email protected] > > > > Silver-list archive: http://escribe.com/health/thesilverlist/index.html > > > > List maintainer: Mike Devour <[email protected]> > > --- > 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
