|Re: DI Water (archive)|
Posted by R Thompson on October 03, 1998 at 19:29:44:
In Reply to: Infomercial (Revolutionizer) posted by Brian on October 02, 1998 at 00:13:15:
I haven't seen the comercial but I know a bit about water treatment. Kessler is right. If you remove all of the minerals from the water it won't leave any spots. The old way of doing this was by distillation. Modern ion exchange resins do the job a little differently. They exchange the mineral ion for othe ions. In a home water softener the calcium and other mineral ions that cause water hardness are exchanges for sodium ions. This water will still leave spots. More high tech ion exchange resins will exchange the different mineral ions for hydrogen and hydroxide ions which unite to form more water. This wate is so pure that it will not leave spots. I just don't know it the product you saw the add for is using these higher priced resin beads. They will also have a life time dependent on the feed water quality.
Hope this was a little clearer than my usual explanations.
Better living through chemistry!