EN ISO 7393-2:2000 Water Quality - Determination of Free Chlorine and Total Chlorine - Part 2: Calorimetric Method Using N,N-Diethyl-1,4-Phenylenediamine, for Routine Control Purposes
2018EN ISO 7393-2:2018 Water quality - Determination of free chlorine and total chlorine - Part 2: Colorimetric method using N@N-dialkyl- 1@4-phenylenediamine@ for routine control purposes
2000EN ISO 7393-2:2000 Water Quality - Determination of Free Chlorine and Total Chlorine - Part 2: Calorimetric Method Using N,N-Diethyl-1,4-Phenylenediamine, for Routine Control Purposes