Oops, OK, Sorry, my mistake.
I did say my knowledge of chemistry was minimal {but I am still reading in an
attempt to get a better grasp of pH testing methods} <g>.
N.
> From: [email protected]
> To: [email protected]
> Date: Fri, 2 Jul 2010 21:21:13 -0500
> Subject: RE: CS>Testing pH?
>
> 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
> > _________________________________________________________________
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>
> [Mike Devour, Citizen, Patriot, Libertarian]
> [[email protected] ]
> [Speaking only for myself... ]
>
>
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