Ivan Anderson wrote: > > It seems to depend upon what the particles are composed. If the > > particles contain a number of uncharged atoms along with charged > atoms, > > then the conductivity is the sum of the charges, but the concentration > > of recoverable metal is the sum of both. (This is the most compelling > > reason to limit the amount of cathode build up, as some inevitibly > > enters the solution.) > > However, if the particles are comprised wholey of charged atoms then > the > > conductivity reflects the recoverable metal.
Actually the conductivty will be proportional to the sum of the charges TIMES THE MOBILITY OF THE CHARGES. If we are talking about atoms, then this term falls out, but in the case of a colloid, the larger the particle the lower the mobility (visulize a one pound pull on a toy boat vs a full size boat to see how size can change the mobility). That makes it really difficult (impossible?) to determine ppm and or particle size from a conductivity measurement alone. Marshall -- The silver-list is a moderated forum for discussion of colloidal silver. To join or quit silver-list or silver-digest send an e-mail message to: [email protected] -or- [email protected] with the word subscribe or unsubscribe in the SUBJECT line. To post, address your message to: [email protected] List maintainer: Mike Devour <[email protected]>
