JIS K 7230:2007 PDF

Scope: This Standard specifies a colorimetric comparison method for the determi' nation of the amount of ammonia and ammonium compounds in phenol-formaldehyde mouldings. 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)

JIS K 7230:2007 Referenced Document

ISO 3696 Water for analytical laboratory use; Specification and test methods
ISO 4793 Laboratory sintered (fritted) filters; Porosity grading, classification and designation
JIS R 3505 Volumetric glassware
JIS Z 8402-2 Accuracy (trueness and precision) of measurement methods and results -- Part 2: Basic method for the determination of repeatability and reproducibility of a standard measurement method
JIS Z 8801-1 Test sieves -- Part 1: Test sieves of metal wire cloth*， 2019-01-01 Update

2007 JIS K 7230:2007 Plastics -- Phenol-formaldehyde mouldings -- Determination of free ammonia and ammonium compounds (Indophenol method)
1995 JIS K 7230:1995 Determination of free ammonia in phenol-formaldehyde moldings