2
ion exchange resin, which act like tiny magnets stripping ions from water,
replacing them with H and OH ions which ultimately join to form water
(H2O). Ion exchange resins are synthetic polymers with many ion
exchange sites attached to the surface.
What is resistivity/conductivity?
The majority of impurities in potable water are in the form of disassociated
ionized mineral salts, such as NaCl and CaCO
3
. Because such ions carry
an electrical charge, their presence is directly related to the ability of the
water to conduct electricity (conductivity). Conversely, their relative
absence is directly proportional to the water’s inability to conduct
electricity, or it’s resistivity. Hence, resistivity, (and it’s reciprocal,
conductivity) are the best parameters by which to gauge the quality of
purified water.
Resistivity is measured in ohms/cm and it’s reciprocal, conductivity is
measured in mhos/cm or siemens. It is important to realize that resistivity
and conductivity are measures of only ionic impurities and are not affected
by particulates, bacteria, or other organic contamination.
Summary of Contents for OH 45414
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