Nick Zarlinga
Aquarium Biologist
Cleveland Metroparks Zoo
216-661-6500 ex 4485
"Fish worship... is it wrong??" (Ray Troll)
On Wednesday, March 06, 2002 11:24 AM, Bruce Stallsmith [SMTP:fundulus_at_hotmail.com] wrote:
> I would agree with Al. I didn't realize you were specifically trying to
> calculate NaCl ppt, that's somewhat different from calculating TDS of
> natural freshwaters. A lot of different things in solution can contribute to
> conductance, so Al's suggestion of a standard curve would allow you to
> narrow your results. If you're REALLY serious about accurate results, you
> gotta spring the several thousand dollars for a real salinometer. (When
> you're through with it, could I borrow it?)
>
> --Bruce Stallsmith
> Huntsville, AL, US of A
>
> >I would make up my own stock solutions, at least
> >three, of known salt concentration and then draw a
> >curve through it ... and then note where your water
> >falls....to redce the non'linearity of the measurement
> >you should make stock solutions that fall beyond
> >either end of your desired concentration. Note
> >microsiemens will include any conductable impurity of
> >your water, so if your pond/tank water already has a
> >number of minerals in it you will have to take that in
> >account too....just use it instead of deonized water
> >when you make your stock solutions, and use some
> >without adding any salt as a baseline.
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/ For more information about NANFA, visit our web page, http://www.nanfa.org