----- Original Message -----
From: "Ryuji Suzuki" <rs@xxxxxxxxxxxxxxx>
To: <pure-silver@xxxxxxxxxxxxx>
Sent: Thursday, April 06, 2006 6:01 PM
Subject: [pure-silver] Re: Deionized Water-Advantages &
Sources?
From: "Richard Knoppow" <dickburk@xxxxxxxxxxxxx>
Subject: [pure-silver] Re: Deionized Water-Advantages & Sources?
Date: Thu, 6 Apr 2006 14:35:11 -0700
Also, if the water has orgainic matter in it, this is coagulated and
precipitated. The method I learned was to boil the water for about
three minutes and allow it to cool without disturbance. Then decant
or syphon off the clear water. I suspect the use of this method
along with an activated charcoal filter (like a Brita filter) would
get most stuff out of the water.
For organics, I don't know if boiling is good enough. Charcoal filter
works, though.
One way to remove certain organic impurities is to stir the solution
with granulated active charcoal and filter out the charcoal.
Another way is to use an insoluble but dispersible polymer compound
that can adsorb a lot of target compounds. I mentioned in the dichroic
fog thread that poly(vinyl pyrrolidone) is used to remove excessive
phenolic compounds from white wine, but this compound can be used to
purify water and cartain chemical stocks as well. In this case, you
don't want to dissolve PVP so you want to use very high molecular
weight PVP, or you want to crosslink the polymer and wash it in pure
water before use. (Incidentally, gelatin is more commonly used to
remove excess polyphenolics from red wine.)
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