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ISO 7393-2:1985
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ISO 7393-2:1985 Water quality - Determination of free chlorine and total chlorine - Part 2 : Colorimetric method using N,N-diethyl-1,4-phenylenediamine, for routine control purposes
standard by International Organization for Standardization, 10/01/1985
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Full Description
Specifies a procedure for water, readily applicable to field testing; it is based on measurement of the colour intensity by visual comparison of the colour with a scale of standards which is regularly calibrated. Sea water and waters containing bromides and iodides comprise a group for which special procedures are required. The procedure is applicable to concentrations, in terms of chlorine, from 0,000 4 to 0,07 mmol/l total chlorine and at higher concentrations by dilution of samples. Interferences of the procedure are noted.