This 5 - stage filter has... 3 pre-filters before the reverse osmosis filter, to protect the reverse osmosis filter membrane from chemicals like chlorine and chloramines the main reverse osmosis filter one carbon filter after the reverse osmosis filter that removes any small impurities that might remain in the water This 5 - filter system removes up to 97.2 % of over 1,000 -LSB-...] (chestsculpting.com)
The polymer - based RFB we present uses an environmentally benign sodium chloride solution and cheap, commercially available filter membranes instead of highly corrosive acid electrolytes and expensive membrane materials. (nature.com)
Mapping bacteria on filter membranes, an innovative SERS approach — SiyueGao — Journal of Microbiological Methods (microbiomedigest.com)