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适用范围： This Standard specifies a colorimetric comparison method for the determi'nation of the amount of ammonia and ammonium compounds in phenol-formaldehydemouldings. NOTES 1 This 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 food- stuffs in contact with the article has to be considered. The International Standard corresponding to this Standard is as fol- lows. In addition, symbols which denote the degree of correspondence in the contents between the relevant International Standard and JIS are IDT (identical), MOD (modified), and NEQ (not equivalent) according to ISO/IEC Guide 21. ISO 14849: 1999 Plastics- Phenol-tbrmaldehj,de mouldings-- De- termination of free ammonia and ammonium compounds- Indophe- nol method (MOD)