Available chlorine: A measure of the amount of chlorine available in chlorinated lime, hypochlorite compounds, and other materials.
free available chlorine That portion of the total residual chlorine remaining in water at the end of a specified contact period which will react chemically and biologically as hypochlorous acid or hypochlorite ion.
the available chlorine which remains in solution after the demand has been satisfied. Compare chlorine demand.
reverse osmosis
a water treatment method whereby water is forced through a semipermeable membrane which filters out impurities.
 See also: Contaminant, Air, Solution, Reduction, Condition
  
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