Marshall wrote: > Colloidal silver does generally have particles of from 5 to 15 nanometers. Why > do you think that statement is wrong?
They did not say the colloidal silver "generally" has particles of 5 -15 nm, they said the definition of colloidal silver was that it had such particles. By their definition, a colloid containing particles that are 0.5 to 5 nm would not be colloidal silver. What non-sense. Even saying that the particle size is generally 5 -15 nm is a fiction. After having made hundreds of particle size measurements on samples from home generators and commercial products alike I can state with high certainty that the range of particle size is generally a lot wider than 10 nm. A more accurate statement would place the sizes from 5 to 200 nm with some samples having particles as large as 500 nm. In our experience, most people who make statements regarding particle size have not actually measured the size of the particles nor do they have the means to do so. > The part about positive charge, we ALL believed that until rather recently when > your zeta measurements indicated otherwise. (Theoretically I still believe the > particles DO have a positive charge, and the OH which surrounds the particle > has a negative charge that shields the positive charge, and gives the overall > particle/OH structure an apparent negative polarity). What you are talking about is called the "electric double layer" which is what produces the zeta potential. Here is a graphic that explains it: http://www.silver-colloids.com/Tutorials/Intro/pcs17.html (from the tutorial on zeta potential found here: http://www.silver-colloids.com/Tutorials/Intro/pcs1.html ) Also see the Definition of Term for zeta potential and follow the link for "slipping plane": http://www.silver-colloids.com/Papers/definitions.html#zeta.potential The bottom line is that the silver particles do not have a "positive charge" as is so widely reported. They do have a negative charge owing to the zeta potential which causes the particles to behave as though they have a negative charge. frank key -- The silver-list is a moderated forum for discussion of colloidal silver. Instructions for unsubscribing may be found at: http://silverlist.org To post, address your message to: [email protected] Silver-list archive: http://escribe.com/health/thesilverlist/index.html List maintainer: Mike Devour <[email protected]>
