Hi again Roger, ----- Original Message ----- From: <rogalt...@aol.com>
> Ivan: > > I believe I addressed the CO2 issue earlier. As I said before, I don't > believe that Ag+ is present in unadulterated, electrolytically produced CS, > and even if it were, why would it clog "the pores of the junction" if a > Ag/AgCl reference electrode were used. It seems to me that a saturated > condition ALREADY EXISTS by virtue of the presence of solid AgCl, so > precipitation specifically at the junction would be unlikely unless LOCAL > temperature fluctuations caused periodic supersaturation. And even then, the > supersaturated condition would be transient. Experience with READING a good > quality pH meter should reveal measurement problems with CS, or anything else > for that matter. > > Roger The wire of the reference electrode is Ag/AgCl and is surrounded by a KCl solution. Ag ions can react with this solution forming precipitates which can plug the pores of the reference / test solution junction, so I am led to believe. The quote I posted comes from a manual on pH testing. Yes of course there is no substitute for experience, something I am lacking! Ivan. > In a message dated 00-04-25 09:16:19 EDT, you write: > > << Guys, > > I never said the measurements were erroneous, I said that there is > probably some other reason causing the low pH reading, perhaps ranging > from CO2 inclusion to AgOH production, or possibly faulty / > inappropriate pH measuring equipment. > I mentioned pH test gear as a possible source of error with this quote > in mind : > > "Chemical reactions between electrolytes and the measured solution > lead to errors. The resulting precipitates clog the pores of the > junction and thereby increase the electrical resistance considerably. > The following ions react with KCI to form compounds of low solubility: > Hg 2+ , Cu 2+ , Ag + , Pb 2+ , CIO 4" > > I have a glass lab grade pH electrode and am vigilant in keeping the > junction squeaky clean. > > I accept that pH of HVAC CS is acidic... now why is it so? > > Ivan. -- 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: silver-list-requ...@eskimo.com -or- silver-digest-requ...@eskimo.com with the word subscribe or unsubscribe in the SUBJECT line. To post, address your message to: silver-list@eskimo.com Silver-list archive: http://escribe.com/health/thesilverlist/index.html List maintainer: Mike Devour <mdev...@id.net>
