Water quality - Determination of free chlorine and total chlorine - Part 2: Colorimetric method using N,N-diethyl-1,4-phenylenediamine, for routine control purposes (ISO 7393-2:1985); German version EN ISO 7393-2:2000— 17 стр.
Influence of cementitious products on water intended for human consumption - Test methods - Part 1: Influence of factory made cementitious products on organoleptic parameters; German version EN 14944-1:2006— 58 стр.
Influence of organic materials on water intended for human consumption - Organoleptic assessment of water in storage systems - Part 1: Test method; German version EN 14395-1:2004— 21 стр.