Trem wrote: > So that explains why our CS shows very faint Tyndall except in the dark or > subdued light. It's because the CS is mostly ionic. By your recent > analysis of CS made with our SG7 it's 99.97% ionic. > > What wasn't clear to me is why there were some large particles showing in > the > microphotographs and yet I see a weak Tyndall. That has always bothered me. > It was a dichotomy that I couldn't rationalize. Thanks for making it more > clear to > me. > > However, there's another problem. We have had samples analyzed using AA > and the results always came back 85% ionic...15% colloidal. That seems > incongruous doesn't it? How do you think it can be almost 100% ionic when > you test it and only 85% when another lab does the test? I'm stumped. > Do you think one of the methods skews the results? > > I have been able to produce CS with very pronounced Tyndall but of course > it was always colored....the depth of color directly related to Tyndall > effect. I have always tried to produce clear CS knowing the particles > were as small as possible if there was no color.
The variation in ionic/particle ratio is consistent with the electrolysis process used to produce the solution. In other words, the process does not produce consistent results from one batch to the next. We separate the particles from the ions using a Beckman Ultra centrifuge that produces 360,000 G-forces. Once the particles are removed, the remaining solution contains only ions. We use a Photon Correlation Spectrometer (PCS) to verify that the particles have successfully been removed. We measured the total silver and ionic silver concentration on the Perkin Elmer 4100 Atomic Absorption Spectrometer. You have not specified how the 85% measurement was performed. You might ask the other lab to explain exactly what method was used to determine the ions and particles. There were enough particles present in the sample we analyzed to measure the particle size distribution using the PCS. Below is the result of our tests. The SG 7 sample measures as follows: Total silver: 21.50 ppm Ionic silver: 21.45 ppm Particles: 0.05 ppm Percent Ionic: 99.77% Particle Surface Area: Negligible Particle sizes (by volume) fall into three distributions as follows: % Mean (nm) Width (nm) 86.6 23.1 12.2 8.6 105.8 89.6 4.8 457.9 238.1 Analysis of data: This sample is an 'ionic silver solution', not colloidal silver. The Tyndall was caused the large particles in the 457.9 nm diameter peak. For very low particle concentrations, there will be no apparent color even though there are sizable particles present. frank key -- 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]>
