Water quality. Determination of free chlorine and total chlorine, Colorimetric method using N,N-diethyl-1,4-phenylenediamine for routine control purposes— 16 стр.
Water quality; Determination of free chlorine and total chlorine; Part 2 : Colorimetric method using N,N-diethyl-1,4-phenylenediamine, for routine control purposes— 12 стр.