Back

ISO 120:1977

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

General information
Valid from 01.10.1977
Directives or regulations
None
Standard history
Status
Date
Type
Name
01.10.1977
Main
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.
*
*
*
PDF
42.23 € incl tax
Paper
42.23 € incl tax
Standard monitoring