DIN EN ISO 7393-1 : 2000 Title: Water quality - Determination of free chlorine and total chlorine - Part 1: Titrimetric method using N,N-diethyl-1,4-phenylenediamine (ISO 7393-1:1985); English version of DIN EN ISO 7393-1 Year: 2000 Publisher: DIN Media GmbH Availability: Within 1-2 working days