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ISO 120:1977

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

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

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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.

SDO ISO: International Organization for Standardization
Document Number ISO 120
Publication Date Not Available
Language en - English
Page Count
Revision Level
Supercedes
Committee ISO TC 61/SC 12/WG 1
Publish Date Document Id Type View
Not Available ISO 120:1977 Revision