The metal concentration in ppm expresses the weight of the metal versus the weight of the liquid in which it is suspended. Particle concentration can be a very confusing measurement when comparing colloidal silver products, because colloids with very large particles can have a high concentration of metal (ppm) but a very low particle surface area.
Some websites claim that concentration (ppm) by itself does not determine colloidal effectiveness and that only the particle surface area does. However, that is not the truth. When one is talking about catalytic or chemical effectiveness the surface area of the particles is important indeed. However, antimicrobial effectiveness is granted via the slow, gentle release of silver ions from a particle core, not by the surface area.
Colloidal silver effectiveness is not, in any meaningful way, dependent on particle surface size. A higher surface size will likely release more silver ions in solution; however, this is rather insignificant, as even a few ions released by lower surface particles are, by far, more than enough for antimicrobial properties.
Moreover one cannot talk about “surface are” unless the surface is solid. Small clusters of atoms are considered dissolved, not solids, so from 1.5 nm and below the surface area concept as it relates to chemical reactivity of the service changes dramatically.
Silver ions are not particles of metallic silver. Silver particles consist of several hundred or thousands of silver atoms clustered together which have the physical properties of metallic silver. Silver ions do not have the physical properties of metallic silver. A silver ion is a single atom of silver that is missing one orbital electron. Since the outermost orbital electrons of atoms determine the physical properties of matter, the missing electron causes dramatic changes in the physical properties. For example, metallic silver is not water-soluble, but silver ions are and cannot exist without water or some other solvent. Because the physical properties of silver particles and ions are so dramatically different, the terms cannot be used interchangeably.
What most silver experts miss is that there is a constant release of occasional ions from a particle made of thousands of silver atoms. Thus, only one atom in a few thousand becomes an ion and is released from the particle, a type of shedding.
Colloids are silver particles in suspension, not silver ions in solution. To make a true colloid is a complicated, complex, costly process. It is no mystery why most producers choose to make ionic silver instead and simply call it colloidal silver. Thankfully, more consumers are educating themselves about this deception, as well as all of the misleading information out there, and more and more are learning this simple test: If it looks like water, it is ionic silver, not a true silver colloid.
“This statement has not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.”