Warning lights and warning signal units ECE-R65 emitting blue and amber light
Edition 2023-02

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

Chemical analysis of ferrous materials - Determination of phosphorus in non-alloyed steels and irons - Molybdenum blue spectrophotometric method; German version EN 10184:2006
Edition 2006-05

Animal feeding stuffs - Determination of Hydrocyanic acid by HPLC; German version EN 16160:2012
Edition 2012-05

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

Measurement methods of blue light characteristics and related optical performance for visual display terminals (IEC 63207:2022); German version EN IEC 63207:2022
Edition 2023-07

Textiles - Tests for colour fastness - Part B08: Quality control of blue wool reference materials 1 to 7 (ISO 105-B08:1995 + Amd 1:2009); German version EN ISO 105-B08:1999 + A1:2009
Edition 2010-02

Iron blue pigments - Specifications and methods of test (ISO 2495:1995); German version EN ISO 2495:2000
Edition 2000-05