Distilled water should be around pH 7 when freshly made. However, if
left sitting around exposed to air, it can go down to pH 5.5. I read
that nitrogen which is 78% of the air reacts with the DW and creates
nitric acid.
If you measure the pH of your DW right before you make EIS and right
after making EIS, you should get a higher pH.
Joe H.
On 08/07/2013 12:39 PM, Da Darrin wrote:
Strange!
My meter or the best test strips I could find never went over 6.8 no
matter how fresh or old my solution was.
Dave
On Mon, Jul 8, 2013 at 9:16 AM, Marshall <[email protected]
<mailto:[email protected]>> wrote:
On 7/7/2013 11:45 AM, Neville Munn wrote:
Just as a point of interest, I had a couple of samples of mine
tested specifically for pH a couple of years ago.
Sample 1. Tested within 24 hours after production and pH read
off the scale on the alkaline.
Sample 2. Tested after it had been in storage for a week or so
read >7.0
Note: Whilst I am unable to locate the exact numbers on the
above, I do know they were greater than base 7.0 because I had
those two samples tested specifically for pH to varify the
findings of the following.
Several years prior to the above I had several other samples
{from different batches and storage time frames} laboratory
analysed of my EIS and one of those tests included pH and ALL
were between 7.4 and 7.8
My conclusion going on all the above tests...pH is sky high
immediately after cessation of the brewing process but drops over
time to steady at >7.0, none were below 7.0 or acidic.
That is expected. Ionic silver is a combination of silver oxide
and silver hydroxide. Silver hydroxide is alkaline. Over time the
ionic silver tends to form colloidal silver, thus the ph should go
down toward 7. Now if exposed to air for sufficient time, the
ionic silver will eventually react with CO2 in the air forming
silver carbonate, a salt, and eventually one could expect the pH
to go below 7, as carbonic acid is formed and there is no silver
hydroxide left to neutralize it.
I had samples 1 and 2 tested by water people {people who monitor
swimming pools} as I don't trust those Litmus paper thingo's, or
those pH meters.
I think most of these people use the pH meters themselves. If
done properly, the meters can be quite accurate.
Marshall
