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

ISO-120 - 1ST EDITION - CURRENT


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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.

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83.080.10 (Thermosetting materials Including ebonite Silicones, see 71.100.55)

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Document Number

ISO 120:1977

Revision Level

1ST EDITION

Status

Current

Publication Date

Oct. 1, 1977

Committee Number

ISO TC 61/SC 12/WG 1