A previous posts by anonymous reminded me about this issue.
I am sorry to spoil the business for those who sell the so-called "reverse osmosis" filters under a claim that they remove fluorides.
Sodium fluoride, sodium silicofluoride, fluorosilicic acid, hydrofluosilicic acid, ammonium fluosilicate are among the compounds used as fluoridating agents.
All those substances become ionized in water, and so, they would pass right through the reverse osmosis filter.
IYou can read that in any textbook on laboratory chemistry.
Reverse osmosis is the passage of water under pressure through a semipermeable membrane made of cellulose acetate, aromatic polyamides, cellulose acetobutyrates or other materials.
This treatment removes approximately 90 percent of DISSOLVED SOLIDS and 98 percent of ORGANIC impurities, INSOLUBLE matter and microbiological organisms.
Reverse osmosis removes only about 10 percent of IONIC IMPURITIES impurities and does not remove DISSOLVED GASES.
This method of water purification will produce type III water (the lowest laboratory grade) and is frequently used to treat water BEFORE its passage through ion-exchange resins to reduce the load on an expensive ion-exchange bed.
In addition to claims that reverse-osmosis filters remove fluorides, some commercial enterprises sell water filtered using reverse osmosis, also with a claim that it removes fluorides.
I guess the only reason they continue doing that is because so far nobody had sued them for misrepresentation.
You can read more at
http://www.deadwater.info/filter.htmbest regards: oleg
