ISO 9397:1995
$19.50
Plastics — Phenolic resins — Determination of free-formaldehyde content — Hydroxylamine hydrochloride method
| Published By | Publication Date | Number of Pages |
| ISO | 1995-04 | 6 |
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.
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