ISO 120-1977 塑料 酚-醛模塑件 游离氨和铵化合物的测定 比色法

标准号：ISO 120-1977
中文标准名称：塑料 酚-醛模塑件 游离氨和铵化合物的测定 比色法
英文标准名称：Plastics; Phenol-formaldehyde mouldings; Determination of free ammonia and ammonium compounds; Colorimetric comparison method
标准类型：G31
发布日期：1999/12/31 12:00:00
实施日期：1999/12/31 12:00:00
中国标准分类号：G31
国际标准分类号：83.140.99
适用范围：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.