GSO ISO 4645:2017
Gulf Standard
Current Edition
·
Approved on
03 October 2017
·
Rubber and rubber products -- Guide to the identification of antidegradants -- Thin layer chromatographic methods
GSO ISO 4645:2017 Files
English
6 Pages
Current Edition
Reference Language
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GSO ISO 4645:2017 Scope
1 .1 This International Standard describes two methods for
the detection and identification, by thin layer chromatography,
of antidegradants (antioxidants, antiozonants and stabilizers),
which may be present in raw rubber, unvulcanized compounded
rubber, or rubber products.
Method A is a simplified method, based on a single solvent
system, which provides for the identification of known
materials and may be used to check the presence or absence of
a particular antidegradant which should be present.
Method B is a more detailed method, using additional solvents
and sprays, which enables a greater degree of separation of the
spots to be obtained and therefore may be used to detect and
identify an unknown antidegradant.
1.2 Antidegradants to which these methods are applicable
include phosphited polyalkyl phenols, substituted bisphenols,
secondary amines, substituted cresols and substituted
p-phenylenediamines. Examination for other types of antidegradants
is possible, provided that the requirement of 11.1 is
met.
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