Surface active agents. Preparation of water with known calcium and magnesium hardness Ingestion-build-63436 and differential

and differential

including information on the participating laboratories

The methods described in this standard include sample collection and the preparation of a representative sample based on a sampling plan for the purpose of determining particle size distribution and impurities

When fluid flows through a valve

and relative sensitivity of the screen-cassette assembly for

Surface active agents. Preparation of water with known calcium and magnesium hardness Ingestion-build-63436 and differential1 Scope This European Standard specifies a method of preparing water of known calcium and magnesium hardness for use in testing surface active agents and products containing them.