sajid akthar wrote:
>
> Hi All
>
>
>
> Sorry for non CCP4 question. I want to make Pottasium Nitrate solution
> of pH 6.9 (ofcourse for crystallisation trails only). I'm adjusting pH
> by using NaOH. But it seems the pH is not stable after sometime. Is
> there any good way to do it.
>
>
>
> Thank you
>
>
>
> Sajid
>
>
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> to know how.
I would think a solution potassium nitrate in deionized water would have
a negligible effect on the pH of a buffered crystallization solution. I
wouldn't bother trying to adjust the pH, because the solution is not
sufficiently buffered, and depending on the ionic strength of the
solution, may not have sufficient conductivity to allow a pH electrode
to work properly.
Cheers,
--
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Roger S. Rowlett
Professor
Colgate University Presidential Scholar
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