BS EN ISO 7393-2:2000

National foreword
0 Introduction
1 Scope and field of application
2 Definitions
3 Principle
4 Reagents
5 Apparatus
6 Procedure
7 Correction of interface due to the presence of
    oxidised manganese
Annex A Separate determinations of combined chlorine
         of the monochloramine type, combined chlorine
         of the dichloramine type and of combined
         chlorine in the form of nitrogen trichloride
Annex B Preparation of water free from oxidizing and
         reducing substances
Bibliography
Tables
1 Terms and synonyms in relation to actual
    compounds in the solution
2 Analytical parameters from interlaboratory
    analysis for free residual chlorine

Colorimetric method for the determination of free and total chlorine in water, excluding sea water and waters containing bromides and iodides, for chlorine concentrations in the range 0.03 to 5 mg/l; method is readily applicable to field testing.