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ISO 120:1977

Plastics — Phenol-formaldehyde mouldings — Determination of free ammonia and ammonium compounds — Colorimetric comparison method

Publication date:   Oct 1, 1977

General information

90.93 Standard confirmed   Mar 4, 2020

ISO

ISO/TC 61/SC 12 Thermosetting materials

International Standard

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
ISO 120:1977
90.93 Standard confirmed
Mar 4, 2020