This standard specifies a colorimetric comparison method for the semi-quantitative determination of the amount of ammonia in phenol-formaldehyde mouldings. The amount of ammonia in a moulded article is of importance when corrosion of metal inserts or contamination of foodstuffs in contact with the article has to be considered.
Number of pages: 12
Date of approval: 1999-03-31
EN ISO 120:1998 IDTISO 120:1977 IDT