Ivan wrote:

> Perhaps just putting some freshly scrubbed silver sheet or wire into
> 50ml of water, cover and leave for a week or so.
> 
> I have some silver powder salvaged from the cathode of one of my
> batches, I shall put it into some DW and leave for a while and test it
> with the ISE. The ISE may not be able to measure the low concentrations
> one might expect, but it is worth a try.

An ISE is unlikely to have a detection limit sufficient for this task.

Here is a point to ponder. If silver dissolves in water, why would a colloid 
consisting of 5 nm silver particles still be a colloid several months later?

I have such 5 nm colloids that have not turned to ionic solutions. 


frank key


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