Neville, The chemical Harold is adding is not a buffer, but simply an *indicator* that changes color over a range of pH. It's a similar thing to the stuff that's soaked into litmus paper. It should *not* change the pH of the sample, if it's properly designed and made.
Buffers, as you say, are designed to adjust the pH to a particular value, and don't necessarily have anything to do with measuring the pH. The only way I can think they might is by measuring the amount needed to achieve that pH change you could possibly get some indication of the composition of the acid or alkaline chemistry of the sample. That's just a guess on my part, however. I don't have any experience with such systems. Be well, Mike D. > > This is why I asked if a buffer is *necessary*, I don't want to change > anything, and I don't want to 'neutralise' anything, I just want to take > a measurement *as is*. > > > > I'm content now, knowing that a buffer is not a requirement if simply > wanting to take a straight measurement of water or a solution. > > > > Why do you add the reagent Harold? > > > > Correct me if I'm wrong, but buffers are for the purpose of increasing > or decreasing acidity/alkalinity as a compensatory measure to create a > neutral pH are they not? I don't wish to alter or neutralise anything, > just get a reading of pH of the water/solution as it is from scratch. > > > > N. > > > > From: [email protected] > To: [email protected] > Subject: CS>Testing pH? > Date: Fri, 2 Jul 2010 16:26:24 -0700 > > > > > I test my Distilled water using an aquarium kit.It uses a blue reagent,2 > drops in a measured amt of water. > > Harold > _________________________________________________________________ > If It Exists, You'll Find it on SEEK. Australia's #1 job site > http://clk.atdmt.com/NMN/go/157639755/direct/01/ [Mike Devour, Citizen, Patriot, Libertarian] [[email protected] ] [Speaking only for myself... ] -- The Silver List is a moderated forum for discussing Colloidal Silver. Rules and Instructions: http://www.silverlist.org Unsubscribe: <mailto:[email protected]?subject=unsubscribe> Archives: http://www.mail-archive.com/[email protected]/maillist.html Off-Topic discussions: <mailto:[email protected]> List Owner: Mike Devour <mailto:[email protected]>
