83.080.10;83.140.99 标准查询与下载

GOST 11235-2017 酚醛树脂. 游离酚的测定方法

Phenolformaldehyde resins. Methods for determination of free phenol

BS EN ISO 120:1998 塑料.苯酚-甲醛模塑料.游离氨和铵化合物的测定.比色法

This International Standard specifies a colorimetric comparison method for the semi-quantitative determination of the amount of ammonia in phenol-formaldehyde mouldings. NOTE - This International Standard does not provide an absolute measure of the ammonia present. The amount of ammonia in a moulded article is of importance when corrosion of metal inserts or contami-nation of foodstuffs in contact with the article has to be considered.

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