Historical
ISO 9397:1995
Plastics - Phenolic resins - Determination of free-formaldehyde content - Hydroxylamine hydrochloride method
Cancels and replaces the first edition (1989). Lays down a method of chemically determining free formaldehyde in phenolic resins by potentiometric titration, in aqueous or organic solution. The method is applicable to resins with free-formaldehyde contents up to and including 15 % (m/m). For free-formaldehyde contents between 15 % (m/m) and 30 % (m/m), it may be necessary to adjust the concentrations of the standard volumetric solutions used accordingly. This method must not be used in the presence of hexamethylenetetramine.
CONTENT PROVIDER
International Organization for Standardization [iso]
International Organization for Standardization [iso]