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EN ISO 120:1998

Plastics - Phenol-formaldehyde mouldings - Determination of free ammonia and ammonium compounds - Colorimetric comparison method (ISO 120:1977) EN ISO 120:1998

Publication date:   Dec 22, 2003

General information

60.60 Standard published   Jul 22, 1998

CEN

CEN/TC 249 Plastics

European Norm

83.080.10   Thermosetting materials

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Scope

Specification of a semi-quantitative method. The content of free ammonia in a moulded article is of importance, when corrosion of metal inserts or contamination in contact with the article has to be considered. Distillation of the aqueous extract from a powdered test portion, coloration of the distillate by reaction with Nessler reagent and comparison of the colour with that of standard matching solutions.

Life cycle

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PUBLISHED
EN ISO 120:1998
60.60 Standard published
Jul 22, 1998

Relations

Adopted from ISO 120:1977 IDENTICAL