Photocatalytic activity of surfaces - Determination of photocatalytic activity of surfaces in an aqueous medium by degradation of methylene blue
Edition 2021-10

Water quality; determination of anionic surfactants by measurement of the methylene blue index MBAS (ISO 7875-1:1984, modified); German version EN 903:1993
Edition 1994-01

Tests for geometrical properties of aggregates - Part 9: Assessment of fines - Methylene blue test; German version EN 933-9:2022
Edition 2022-04

Fertilizers - Determination of cold water insoluble nitrogen and hot water insoluble nitrogen in solid urea formaldehyde and methylene urea slow-release fertilizers and determination of the solubility of nutrient polymers in phosphate buffer solution with a pH of 7,5 at 100 °C; German version CEN/TS 17403:2021
Edition 2021-03

Earthworks - Geotechnical laboratory tests - Part 3: Methylene blue value VBS on soils and rocks; German version EN 17542-3:2022
Edition 2022-08

Water quality - Determination of the methylene blue active substances (MBAS) index - Method using continuous flow analysis (CFA) (ISO 16265:2009); German version EN ISO 16265:2012
Edition 2012-05

Fertilizers and soil conditioners - Liquid methylene-urea slow release fertilizers - General requirements
Edition 2023-03

Water quality - Determination of surfactants - Part 1: Determination of anionic surfactants by measurement of the methylene blue index (MBAS)
Edition 1996-12

Water quality - Determination of surfactants - Part 1: Determination of anionic surfactants by measurement of the methylene blue index (MBAS); Technical Corrigendum 1
Edition 2003-07

Water quality; determination of dissolved sulfide; photometric method using methylene blue
Edition 1992-09