Hi Sol,

On Wed, 2008-06-04 at 18:29 -0600, sol wrote:
> Marshall Dudley wrote: 
> > Radon will outgas rather quickly, even more so if you heat it.  Even 
> > if left in a closed container it has a rather short half life, 
> > although it does produce daughters of longer half life.
> >
> > I don't think radon will produce any ions by dissolving in water, and 
> > thus would not expect it to affect a uS reading.
> So will the possible dissolved radon simply cross over with the steam? 
> It will not distill out? Or won't distill out easily--what I've wondered 
> is whether dissolved radon could be the substance in the water here that 
> causes the phenomenon that .4 uS single distilled water will produce 
> yellow CS, but take that water and distill it agian, the uS remains .4 
> uS, but after the second pass through the still, it will make clear CS.
> sol
You might be dealing with volatile organics with a vapor pressure close
to water, or a meter that no longer resolves well below 1 microSiemens,
possibly due to battery or scungy probe contacts. Steam distillation is
noted and used for carrying over other (fractious) fractions of the
original solution.
> 
> 
> 
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