标准摘要
[中文适用范围]： 本标准规定了测定酚醛模制品中氨和铵化合物含量的比色比较方法。 注：本国际标准没有提供氨含量的绝对测量值。 当必须考虑金属嵌件的腐蚀或与制品接触的食品的污染时，模制品中氨的量非常重要。 [外文原描述]： This International Standard specifies a colorimetric comparison method for the determination of the amount of ammonia and ammonium compounds in phenol-formaldehyde mouldings. NOTE This International Standard does not provide an absolute measure of the amount of ammonia present. The amount of ammonia in a moulded article is of importance when corrosion of metal inserts or contamination of foodstuffs in contact with the article has to be considered.
英文名称Plastics — Phenol-formaldehyde mouldings — Determination of free ammonia and ammonium compounds — Indophenol method