Codes & Standards - Purchase
ISO 120:1977
Plastics -- Phenol-formaldehyde mouldings -- Determination of free ammonia and ammonium compounds -- Colorimetric comparison method
SKU: iso_003922_100579
Published by ISO
Publication Year 1977
1 Edition
2 pages
Product Details
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.