Definitions
Chlorine, Residual: the total amount of free & combined chlorine remaining in water systems after its chlorine demand has been satisfied
Chlorine, Total: the sum of free & combined chlorine;
Chlorosity: the concentration of the dissolved chloride equivalent in water at 20 C
Colorimetric: a name which is given to a chemical test method where the results of the test are determined by the amount or shade of colour that is developed
Colour Standard: a hermetically sealed glass tube or slide that contains a stable solution which is equivalent in colour to the colour that is developed when an indicator is added to a definite concentration of chemical (i.e., colour standards are generally furnished in a comparator unit with a series of values covering a specific range
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