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

标准编号：ISO 120:1977

中文名称：塑料.酚-甲醛模塑.游离氨和铵化合物的测定.比色法

英文名称：Plastics — Phenol-formaldehyde mouldings — Determination of free ammonia and ammonium compounds — Colorimetric comparison method

发布日期：1977-10

标准范围

半定量方法的说明。当必须考虑金属嵌件的腐蚀或与制品接触的污染物时，模制制品中游离氨的含量非常重要。蒸馏粉状试料的水萃取物，通过与纳氏试剂反应使蒸馏物着色，并将颜色与标准匹配溶液的颜色进行比较。

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.

标准预览图