SANS 7393-2-2005 水质.游离氯和总氯含量的测定.第2部分:用于常规控制目的的使用N,N-二乙基-1,4-苯二胺的比色法
Water quality - Determination of free chlorine and total chlorine Part 2: Colorimetric method using N,N-diethyl-1,4-phenylenediamine, for routine control purposes
Specifies a method for the determination of free chlorine and total chlorine in water, readily applicable to field testing; based on measurement of the colour intensity by visual comparison of the colour with a scale of standards which is regularly calib