Water quality; determination of anionic surfactants by measurement of the methylene blue index MBAS (ISO 7875-1:1984, modified); German version EN 903:1993— 14 стр.
Water quality - Sampling - Part 3: Guidance on the preservation and handling of water samples (ISO 5667-3:2003); German version EN ISO 5667-3:2003, Corrigenda to DIN EN ISO 5667-3:2004-05— 2 стр.
German standard methods for the examination of water, waste water and sludge; general measures of effects and substances (group H), determination of methylen blue active and bismut active substances (H23)— 13 стр.
Water quality - Determination of the elimination and biodegradability of organic compounds in an aqueous medium - Activated sludge simulation test (ISO 11733:2004); German version EN ISO 11733:2004— 43 стр.
German standard methods for the examination of water, waste water and sludge; general measures of effects and substances (group H), determination of methylen blue active and bismut active substances (H23)— 13 стр.
