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About Reverse Osmosis Membranes

Reverse Osmosis Membrane

TFC Membrane
*Nominal Rejection Characteristics of Reverse Osmosis Membranes
ION  % Rejection  ION  % Rejection 
Calcium  95 - 98  Bromide  93 - 96 
Sodium  94 - 98  Phosphate  97 - 98 
Magnesium  95 - 98  Cyanide  90 - 95 
Iron  97 - 98  Sulfate  97 - 98 
Potassium  94 - 97  Thiosulfate  97 - 98 
Manganese  97 - 98  Silicate  94 - 96 
Aluminum  97 - 98  Silica  85 - 90 
Copper  97 - 98  Nitrate  92 - 95 
Nickel  97 - 98  Boron  60 - 70 
Cadmium  95-98  Borate  40 - 70 
Silver  95 - 97  Fluoride  93 - 95 
Zinc  97 - 99  Polyphosphate  98 - 99 
Mercury  95 - 97  Orthophosphate  98 - 99 
Hardness Ca&Mg  95 - 98  Chromate  90 - 97 
Radioactivity  95 - 98  Bacteria  99+ 
Chloride  90 - 95  Lead  96 - 98 
Ammonium  85 - 95     

*The above percent of rejection is for reference only and not to be construed as any guarantee since the chemistry, temperature and TDS are not constant in each water supply.