pH 10 Colloidal Silver

Reprinted from SilverTron Support Forum.

There is a silver generator dealer who claims that colloidal silver made with his machine has a pH of 10. One of the members of the colloidal silver forum has this generator and measured the colloidal silver made with it using an electronic pH meter. It indeed read pH10. Tested with pH paper, it was nowhere near 10, in fact it was close to neutral pH.

Alkaline solutions feel soapy, slippery, and at pH10 it should be very noticeable.

Why the difference?

The pH of colloidal silver cannot be measured with a standard electronic pH meter. This is because the electrode chemistry in the meter itself is based on silver/silver chloride, and these electrodes are known to read erroneously in solutions containing ionic silver and other transition metals. In fact solutions containing silver will eventually destroy the pH meter probe. There is an electrode designed to measure pH in solutions containing transition metals like silver, it is known as a calomel electrode. Since calomel electrodes are based on mercury, they are not generally used because of the toxicity. Calomel electrodes are also much more expensive.

For the home user, a fairly accurate pH reading of colloidal silver can be made using Hydrion pH test paper, which is only sensitive to hydrogen ions, and therefore is not bothered by silver in the solution. Hydrion paper is available in different ranges, so make sure you get one which reads within a few units of 7.

pH tells us the relationship between hydrogen ions and hydroxide ions in solution. pH above 7 means that there are more hydroxide ions than hydrogen ions. pH below 7 means that there are more hydrogen ions than hydroxide ions. Pure water is usually below pH 7 because carbon dioxide from the air dissolves into the water creating carbonic acid.

Any chemist knows that the way to raise the pH of water is to add more hydroxide ions to it. There are only a few chemical elements that can do that: the ones in column 1 and 2 of the periodic chart of the elements or ammonia. Column 1 elements are known as ‘Alkali’ metals because they raise the pH of solutions making them alkaline. These include sodium and potassium, as well as some toxic metals. Column 2 elements are call ‘Alkaline Earth Metals’ because they also raise the pH of solutions. Column 2 elements include calcium and magnesium, plus some other metals which are extremely toxic. Only these elements, and not silver, can raise the pH of water.

No colloidal silver generator can make pH10 alkaline water unless some other element is added to it which creates the hydroxide ions. Silver does not.