By pretreatment, the reverse osmosis technology, ultra purification processing and post process>ing method, conductive mediums in the water are almost completely remove↑d, and the water dissociation of colloidal substances, gases and organic matter were removed to a αvery low degree, the water resistivity is greater than 10 mega ohm, even← up to 18.25 mega ohm.

  Ultra pure water treatment system consists of four units: pretreatment,↔ reverse osmosis, ultra purification and terminal ultrafiltration.÷ The tap water firstly goes through pretreatment unit, removes the larger particleεs, suspended solids and some organic matters, and goes into the reverse osmosis •unit, to intercept removal of ionic substances and macromolecular substances (such​ as viruses, microorganisms, etc.) in the water, and then after purification and super< purification units, purify and super purify the residual ions after removal of the meβmbrane, the ion content in water is reduced to the level↔ of trace. Finally, through UV, ultrafiltration and other technol>ogies to ensure that ultra pure water microorganisms, organic matter and heat resources meet the≤ needs of various experimental applications.

  Ion exchange in ultrapure water system is a special process of s÷olid adsorption, which is carried out in the electrolyte solution of ion exchang♠er. General ion exchanger is a kind of insoluble solid granular materialδ that is ion exchange resin. It can draw a certain positive ion γor anion from the electrolyte solution, and sign for self contained another ion equivalΩent with the same charge, and release to the solution, this is callεed ion exchange. According to the kind of ion exchange,≤ ion exchanger can be divided into two types: positive ion exchanger and anion exchan∞ger.

    

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