EN ISO 3451-4:1995

SLOVENSKI STANDARD
01-maj-2000
3ROLPHUQLPDWHULDOL'RORþHYDQMHSHSHODGHO3ROLDPLGL,62
Plastics - Determination of ash - Part 4: Polyamides (ISO 3451-4:1986)
Kunststoffe - Bestimmung der Asche - Teil 4: Polyamide (ISO 3451-4:1986)
Plastiques - Détermination du taux de cendres - Partie 4: Polyamides (ISO 3451-4:1986)
Ta slovenski standard je istoveten z: EN ISO 3451-4:1995
ICS:
83.080.20 Plastomeri Thermoplastic materials
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

Foreword
IS0 (the International Organization for Standardization) is a worldwide federation of
national standards bodies (IS0 member bodies). The work of preparing International
Standards is normally carried out through IS0 technical committees. Each member
body interested in a subject for which a technical committee has been established has
the right to be represented on that committee. International organizations, govern-
mental and non-governmental, in liaison with ISO, also take part in the work.
Draft International Standards adopted by the technical committees are circulated to
the member bodies for approval before their acceptance as International Standards by
the IS0 Council. They are approved in accordance with IS0 procedures requiring at
least 75 % approval by the member bodies voting.
International Standard IS0 3451 /4 was prepared by Technical Committee ISO/TC 61,
Plastics.
Users should note that all International Standards undergo revision from time to time
and that any reference made herein to any other International Standard implies its
latest edition, unless otherwise stated.
O International Organization for Standardization, 1986
Printed in Switzerland
INTERNATIONAL STANDARD IS0 3461/4-1986 (E)
Plastics - Determination of ash -
Part 4: Polyamides
1 Scope and field of application 4.2 Ammonium nitrate, approximately 10 % (m/m)
solution.
This part of IS0 3451 specifies three methods for the deter-
mination of the ash of polyamides. The general procedures in
4.3 Sulfuric acid, e = 1.84 g/ml, approximately
IS0 3451/1 are followed. For unfilled materials, method C of
98 % (m/m) solution.
IS0 3451/1 is used. For filled and glass-fibre reinforced
materials, method A of IS0 3451 /I is used. For flame-retardant
4.4 Hydrochloric acid, 32 % (m/m) hydrogen chloride
materials reinforced with glass-fibre, a modification is incor-
solution.
porated to remove any antimony trioxide present.
5 Apparatus
2 Reference
Apparatus specified in IS0 3451 /I, and in particular:
IS0 3451 II, Determination of ash - Part 1: General methods.
5.1 Crucibles of silica or platinium, diameter (upper part)
50 to 60 mm, height equal to the diameter, inert to the material
tested.
3 Principle
5.2 Muffle furnace, capable of being controlled ther-
mostatically at 600 f 25 OC or 750 f 50 OC.
3.1 Unfilled materials
Calcination
...