Steve, I don't think I still have your email and if you would resend it to me I would very much appreciate it.
Dianne Subject: RE: CS>Chelated Silver Date: Thu, 30 Apr 2009 10:22:55 -0500 From: stephen.nor...@ngc.com To: silver-list@eskimo.com Dianne, I just recently posted on silver citrate and how to make it. Silver citrateis a form of chelated silver. See the definition of chelate: http://www.answers.com/topic/chelate. "The biological significance of chelates is demonstrated by the large number of biologically important compounds that are either metal chelates or chelating agents. Included in this group are the alpha amino acids, peptides, proteins, enzymes, porphyrins (such as hemoglobin), corrins (such as vitamin B12), catechols, hydroxypolycarboxylic acids (such as citric acid), ascorbic acid (vitamin C), polyphosphates, nucleosides and other genetic compounds, pyridoxal phosphate (vitamin B6), and sugars." Silver citrate is silver chelated with citric acid. I have made it in 400 and 600 ppm concentrations and use it internally well as externally. there is more info in my recent post. If you no longer have it I can resend it. The product you are asking about appears to be the compound in this patent: http://www.freepatentsonline.com/7311927.html. >From the patent: "In recent decades, extensive research has demonstrated that chelated silver is an active antimicrobial. The antimicrobial action reportedly occurs by blocking the respiration of microorganisms. Chelated silver is different from colloidal silver. Chelated means in solution, whereas colloidal means in suspension. In colloidal suspensions, minute silver particles are suspended or floating in an aqueous solution, and are not evenly dispersed throughout the liquid. Chelated solutions occur when a metal ion forms a heterocyclic ring with a bidentate ligand. Examples of bidentate ligands are carbonate and oxalate ions and ethylenediamine. As a general rule, five- or six-membered rings are favored. Because chelated silver ions are chemically bonded to nonmetallic ions, they are evenly dispersed throughout the solution. The even dispersal of chelated silver ions throughout the solution considerably enhances their antimicrobial action and effectiveness over time." ... "In order to provide an aqueous environment that is conducive to the formation of chelated complexes between silver ion and EDTA or polypectate, a solution containing silver nitrate and ammonia (in the form of amonium hydroxide) is first formulated, after which EDTA and/or polypectate are introduced into the solution. A number of complex ions and neutral molecules are known to coexist in a state of equilibrium within the mixture of silver nitrate and ammonia. As both EDTA and polypectate have a greater affinity for the silver ions than do the ammonium and hydroxide ions, the formation of chelated complexes with the former two compounds is facilitated by the prior addition of ammonia to the silver nitrate." Look familiar? The patent is for external antimicrobial applications and does not address internal use. I have been aware of EDTA and have intended to look more into it's use with silver but it is still on my to-do list. Personally, I would pass on the product and use silver citrate. - Steve N
