715166

ISO 120:1977

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

standard by International Organization for Standardization , 10/01/1977

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Full Description

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.

 

Product Details

Published:
10/01/1977
Number of Pages:
2
File Size:
1 file , 220 KB
Same As:
BS EN ISO 120:1998, BS EN ISO 120:1998
Note:
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