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NBN EN ISO 931997 : 1997
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
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KUNSTSTOFFEN - FENOLHARSEN - BEPALING VAN HET GEHALTE AAN VRIJ FORMALDEHYDE - METHODE MET HYDROXYLAMINECHLOORHYDRAAT
01-07-2005
12-01-2013
Defines a method for the chemical determination of free formaldehyde in phenolic resins by potentiometric titration, in aqueous or organic solution. Applies to resins having free-formaldehyde contents not in excess of 15% (m/m). Not for use when hexamethylenetetramine is present. ALSO NUMBERED AS BS 2782 PART 4 METHOD 451N 1997
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