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What ts the criteria for comparing colloidal silver/
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3/19/2016 How To Compare Colloidal Silver Products
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PublicationsHow To Compare Colloidal Silver Products
Because there is no accepted standard for reporting the contents of colloidal silver products, producers reportthe properties of their products is various ways. The normal practice is to report the total silver content andnothing else. One problem with reporting total silver is that it lumps together the silver particles andsilver ions in a single value. The technical differences between ions and particles are significant. We will tryto explain the differences in an easily understood fashion. (See The Truth About Ionic Silver).
Another problem with using total silver for comparison purposes is that it does not take into account eitherthe particle size, particle surface area, or the particle concentration which are the most important propertiesof colloids.
Particle Size
In his booklet "Silver Colloids", Professor Ronald Gibbs wrote "The size of the particles in the colloidalsilver suspensions we use for health purposes is very important. Particle size controls thesurface area and therefore the effectiveness of the colloidal silver suspension."
Particle Size and Particle Surface Area
Particle surface area is the property of a colloid that determines its effectiveness. Particle size has adirect effect on particle surface area, but in the exact opposite way from what you might expect . . . becauseparticle surface area increases as particle size decreases.
To understand the effect of particle size on surface area, consider a U.S. silver dollar. The silver dollarcontains 26.96 grams of coin silver, has a diameter of about 40 mm, and has a total surface area ofapproximately 27.70 square centimeters. If the same amount of coin silver were divided into tiny particles —say 1 nanometer (nm) in diameter — the total surface area of those particles would be 11,400 squaremeters, which is equal to 122,708 square feet, or 2.817 acres! When the amount of coin silver containedin a silver dollar is rendered into 1 nm particles, the surface area of those particles is 4.115 milliontimes greater than the surface area of the silver dollar! So you can see by this example that the smallerthe particles and the more of them, the greater the particle surface area.
The Importance Of Particle Surface Area
3/19/2016 How To Compare Colloidal Silver Products
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Particle surface area is the property of a colloid that translates directly to the ability of the colloid to reactwith its environment. Effectiveness of colloids is predicated on exposing the largest possible surface area ofthe metal particles to the areas of interest. The importance of colloid particle surface area cannot beover emphasized. It is the single most important attribute for determining how effectively the colloidalparticles will interact with their environment inside the human body.
In the chemical world, reactivity increases with increasing surface area. For this reason particle surface areais an excellent metric for comparing the physical properties of colloidal products. A more technical discussionon particle surface area can be found by clicking here.
Particle Concentration
The metal concentration in partspermillion (ppm) expresses the weight of the metal vs. the weight of theliquid it is suspended in. Particle concentration can be a very confusing measurement when comparingcolloidal silver products because colloids having very large particles can have a high concentration of metal(ppm) but a very low particle surface area. Concentration (ppm) by itself is not what determinescolloidal effectiveness; it is only the particle surface area that does.
Particle surface area increases as the concentration of silver particles increases. Therefore, truesilver colloids that have a high percentage of their silver content in the form of particles will have thehighest particle surface area.
To achieve a high particle surface area for a given concentration (ppm) of metal requires that the size of theparticles be extremely small. The smallest colloid particles ever measured in the lab are only a few timesthe diameter of the atoms themselves and are less than one nanometer in diameter. The highest particlesurface area is achieved when there is a high concentration of these nanometer sized particles. Whilethis is the desired result, it is also the most difficult to achieve.
Comparing Colloidal Silver Products
Since most producers of colloids neither indicate nor differentiate the properties of particle size, particlesurface area or particle concentration on the labels of their products, the only way to know these propertiesis by laboratory analysis. Unless the lab has specialized scientific equipment specifically designed tocharacterize the properties of colloids, the data can be of questionable accuracy. Particle surface area inparticular can be very challenging to measure. It first requires an accurate determination of the particle sizeand concentration. Because of the difficulty involved, these measurements should be performed by alaboratory that specializes in performing analysis of colloids.
Colloidal Science Laboratory (CSL) performs these measurements and publishes the results of astandardized set of physical property measurements. These results include calculating the particle surfacearea. See Determining Properties for technical details about how the laboratory analysis is performed byCSL.
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CSL produces a Comparison Table that shows an example of how to evaluate various products bycomparing the properties associated with particle surface area. Data from the product reports is compiledinto a table so the reader can compare products based on costs and particle surface area. Surface area isexpressed in square centimeters (cm 2) per milliliter (mL) of colloidal solution, and is written as (cm 2/mL).
See the Commercial Product Reports section of this site for detailed reports on colloidal products that CSLhas analyzed.
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