On Saturday November 26 2005 10:13 am, Info - Silver Colloids wrote: > Right on Mike. > > TEM images are virtually worthless for showing colloidal particles in > ionic solutions. Here is the technical explanation why that is so: > > http://www.silver-colloids.com/Pubs/TEM.html > > TEM images are pervasive on internet ads because those using them are > either trying to deceive the non-technical public or they themselves > don't understand what the images are showing. > > The proper way to determine the particle size distribution of > colloidal particles is to use an instrument that is specifically > designed for that purpose. The method is called 'dynamic light > scattering'. One of the foremost companies in the world that > manufactures these instruments is Malvern Instruments in the U.K. > > Here is a brochure on their latest instrument: > http://www.colloidalsciencelab.com/fact_pages/Nano-ZS-brochure.pdf > > This is the instrument we use at the Colloidal Science Lab. Here our > lab setup: > http://www.colloidalsciencelab.com/fact_pages/factMalvern-nano.htm > > Here is a sample of a particle size distribution plot made using the > instrument: > > http://www.silver-colloids.com/Reports/cpr09/MesoSilverSizeReport.pdf > > There are particle size distribution plots available for about many > silver colloid products listed in the comparison table shown here: > http://www.silver-colloids.com/Reports/reports.html#CompTable > > Just click on the product name to bring up the lab analysis report > and then click on 'Complete Size Report' at the lower right of the > lab report page. > > > Frank Key > www.ColloidalScienceLab.com
Hi Frank, I really appreciate your getting involved in this discussion. Like most people on this list I believe, I've visited your websites many times and consider them valuable sources of information. On the sizing of silver ions in solution, I am unable to find anything on your CSL site, http://www.colloidalsciencelab.com/ which appears to indicate that there is a process offered by CSL which actually measures the size of the ions in solution. Total concentration, yes, but size, no. Perhaps this is just because of my inability to interpret the information offered. But I am taking this quote from your site: >"Particle Size Distribution = Dynamic light scattering is employed to >produce >a plot and a table showing how the particle sizes are >distributed across a >size range from 0.4 nm to 10,000 nm. For each >peak in the distribution a >percentage of total volume is calculated to >indicate what percentage of the >total particle volume is attributed to >the particles of that specific size." to mean actual colloidal particles suspended in liquid and NOT ions in solution. If that is not the case, how is one to determine which "particles" are ions in solution and which "particles" are, in fact, colloidal particles in suspension? If what is being measured is only the truly colloidal particles, of what value is this information in evaluating a product such as Sovereign Silver which, if I recall correctly, is 97% ionic? Or for that matter, samples of silver produced by various home generators? All of this is assuming that "ion" in this case means both single ions and groups of ions. If it is assumed that the ionic content is all single ions then I suppose there is really no need to measure them as they will not vary. However is that a reasonable assumption? I genuinely do not know. Thanks for your help in understanding this subject. -- LTR Registered Linux user #280295 it...@kvremcwb.com
