KS I ISO 7393-2-2023 Water quality — Determination of free chlorine and total chlorine — Part 2: Colorimetric method using N,N-diethyl-1,4-phenylenediamine, for routine control purposes
2023KS I ISO 7393-2-2023 Water quality — Determination of free chlorine and total chlorine — Part 2: Colorimetric method using N,N-diethyl-1,4-phenylenediamine, for routine control purposes
0000 KS I ISO 7393-2-2007(2017)
2007KS I ISO 7393-2:2007 Water quality-Determination of free chlorine and total chlorine-Part 2:Colorimetric method using n,n-diethyl-1,4 phenylenediamine for routine control purposes