BS EN ISO 5815-1. Water quality. Determination of biochemical oxygen demand after n days (BOD$dn). Part 1. Dilution and seeding method with allylthiourea addition— 35 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.