Surface active agents. Preparation of water with known calcium and magnesium hardness Ingestion-build-135476 Why should you use BS

Why should you use BS EN 61587-4 - Protection for cabinet systems

Why should you use BS EN 60669-2-3 - Time delay switches for household and electrical installations

Determines the maximum permissible voltage test

BS EN 14131 provides you with guidance on apparatus

This International Standard supersedes BS 2576:1986 which is withdrawn

Surface active agents. Preparation of water with known calcium and magnesium hardness Ingestion-build-135476 Why should you use BS1 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.