ISO 120:1977

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

Publication date: 1 tet 1977

General information

Current stage: 90.93 Effective date: 18 qer 2025

Originator: ISO

Owner: ISO/TC 61/SC 12

Type: International Standard

ICS: 83.080.10

Gjuha: frëngjisht anglisht

Buying

Statusi: Publikuar

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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

NOW

PUBLISHED
ISO 120:1977
90.93 Standard confirmed
18 qer 2025