RE: NANFA-- conversion factors
Al G Eaton (sege7_2000_at_yahoo.com)
Wed, 6 Mar 2002 07:42:09 -0800 (PST)
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.
--- "Nicholas J. Zarlinga"
<njz_at_clevelandmetroparks.com> wrote:
> The 1.7 and .6 values are a good basis to go on,
> thanks. Unfortunately, in
> this situation I was hoping to look for something a
> little more precise. I
> am doing a NaCl treatment on an outdoor pond for
> fungus and parasites and
> my refractometer is giving me mixed results. The
> Salinity meter is telling
> me that the value of the water is 4.8mS. In a
> normal marine aquarium
> situation where the concetration of salts in the
> water is variable, it is
> not as important to be precise, however the
> concentration of salts in
> freshwater is a bit more important to me since we
> are dealing with low
> dissolved solids for a therapeutic dosage. The
> conversion table I have
> reads from 19.3ppt to 40.2ppt and the conversion
> values are not linear,
> making it difficult to extrapolate for a much lower
> dosage. Furthermore, I
> am not sure that the values are calculateable at the
> extreme low end of the
> spectrum. Any thoughts?
>
> Nick Zarlinga
> Aquarium Biologist
> Cleveland Metroparks Zoo
> 216-661-6500 ex 4485
>
> "Fish worship... is it wrong??" (Ray Troll)
>
> On Tuesday, March 05, 2002 8:43 AM,
> EELReprah_at_aol.com
> [SMTP:EELReprah_at_aol.com] wrote:
> > In a message dated 3/5/02 7:49:00 AM,
> njz_at_clevelandmetroparks.com writes:
> >
> > << Can anyone tell me how to convert milliSiemens
> (mS) to parts per
> thousand
> > (ppt)?
> > >>
> >
> > For normal type of dissolved solids I have found
> the conversion factor to
> be
> > 1.7 to convert microsiemens to parts per million.
> Since both are 1000
> times
> > the milli and per thousand it should be the same.
> So microsiemens is 1.7
> > times the ppm or millisiemens is 1.7 times the
> ppt. It will vary,
> depending
> > on the nature of the salts involved. Pure
> potassium chloride solution is
> 2.0
> > times conversion factor. It is often used for
> calibration of meters but
> > doesn't really correspond to tap water.
> >
> > Lee Harper
> >
>
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