info on measuring pH in DI water
 

hey Brad from what I learned in water quality (we are very concerend about the ph and the desolved minerals in our boilers) blowing a tube at 650psi and 800 degrees isn't something I want to see again [img]images/smiles/icon_biggrin.gif[/img]

Pure water is a PH of 7.0 when we distill our sea water we end up with a water that is 7.0 PH and less than 0.065epm. electrical ph testers and other testers such as hardness. need *stuff* in the water to be able to have a current pass from electrode to electrode. absolutly Pure water will not conduct electricity very well but the slightest bit of contamanants and it will flow. so sence the PH meters operate on detecting free H ions when the # of the H ions fall below a certian threshole you will get errors as the electrical signal will not be strong enuf to remain constant. to show another example of this we went out a bought way expensive lab grade test meters for doing our water tests on the ship but everyone was always getting reading that were out to lunch and then when done by titrating acids and such the #'s were always constant. this was because our water requirments for the boilers was to *pure* for the meters to work corectly, so instead of being done water tests in 5 minites is back to the old 1 hour [img]images/smiles/icon_smile.gif[/img]

oh on another note I broke a small piece off that sheet I was talking to yyou on the phone about.. how do I tell if it is what we want or not? or can you tell by looking at it? if so are you going to hillside tomorrow? I have to go to kitchen craft but I couldmeat you somewhare with the sample.

Steve

[ 15 January 2002: Message edited by: StirCrazy ]

info on measuring pH in DI water
 

Ohh Gotcha..

From the reading I have been doing and what Randy Holmes-Farley passed on there is such a low content of H+ Ions in DI water that you can't get a proper reading.

Distilled water may have an Ion level of log of 1 x 10^7. But I am speaking about De-Ionized water. Different creatures. It is for this reason the probe does not work. These Ions aren't at the levels required for the probe to get a reading. FYI The Ions it is reading are available Ions within the solution. The link I posted explains this. It is neat reading for those who don't know what pH is. The link is made specifically for measuring pH with meters. Tho not all the links and such work.

<BLOCKQUOTE><font size="1" face="Verdana, Helvetica, sans-serif">quoteHopefully that clears up the difference in wordings the two of us were using.. [img]images/smiles/icon_biggrin.gif[/img] Same track but different translations.. [img]images/smiles/icon_wink.gif[/img]

I had left out some things as I had put the link for the detailed explanations. [img]images/smiles/icon_smile.gif[/img]

[ 15 January 2002: Message edited by: DJ88 ]