Rubber latex, natural — Determination of alkalinity

Latex de caoutchouc — Détermination de l'alcalinité

General Information

Status
Withdrawn
Publication Date
30-Nov-1983
Withdrawal Date
30-Nov-1983
Current Stage
9599 - Withdrawal of International Standard
Completion Date
01-Jan-1990
Ref Project

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Standard
ISO 125:1983 - Rubber latex, natural -- Determination of alkalinity
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ISO 125:1983 - Rubber latex, natural — Determination of alkalinity Released:12/1/1983
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Standards Content (Sample)

International Standard 125
INTERNATIONAL ORGANIZATION FOR STANDARDIZATION*MEmPYHAPOllHAR OPrAHH3AUHR fl0 CTAHMPTH3AUHn.ORGANISATlON INTERNATIONALE DE NORMALISATION
Rubber latex, natural - Determination of alkalinity
Latex de caoutchouc - D4terrnination de I'alcalinit&
Third edition - 1983-12-01
Ref. No. IS0 125-1983 (E)
UDC 678.031.5 : 543.241.2
Lu
Descriptors : rubber, latex, natural rubber, chemical analysis, determination of content, alkalinity.
P
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Price based on 2 pages
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Foreword
IS0 (the International Organization for Standardization) is a worldwide federation of
national standards bodies (IS0 member bodies). The work of developing International
IS0 technical committees. Every member body
Standards is carried out through
interested in a subject for which a technical committee has been authorized has the
right to be represented on that committee. International organizations, governmental
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.
International Standard IS0 125 was developed by Technical Committee ISO/TC 45,
Rubber and rubber products.
This third edition was submitted directly to the IS0 Council, in accordance with
clause 6.11.2 of part 1 of the Directives for the technical work of ISO. It cancels and
replaces the second edition (i.e. IS0 125-1977], which had been approved by the
member bodies of the following countries :
Australia India Sri Lanka
Austria Ireland Sweden
Korea, Rep. of Switzerland
Belgium
Chile Malaysia Turkey
United Kingdom
Czechoslovakia Netherlands
New Zealand USA
Egypt, Arab Rep. of
France Romania USSR
South Africa, Rep. of
Germany, F. R.
Hungary Spain
No member body had expressed disapproval of the document.
The second edition, which superseded IS0 125-1974, incorporated a draft Amend-
ment, which was circulated to the member bodies in August 1976 and had been ap-
proved by the following countries :
Austria Hungary Spain
Belgium India Sweden
Brazil Italy Turkey
Bulgaria Netherlands United Kingdom
Canada New Zealand USA
France Poland USSR
Germany, F. R. Romania
No member body had expressed disapproval of the document.
0 International Organization for Standardization, 1983 0
Printed in Switzerland

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INTERNATIONAL STANDARD
IS0 125-1983 (E)
Rubber latex, natural - Determination of alkalinity
1 Scope and field of application
4.3 Methyl red. 0,l % solution in ethanol of 95 % minimum
purity.
This International Standard specifies a method f the deter-
mination of the alkalinity of natural rubber latex which contains
This solution is not required when electrometric titration is
preservative agents and which has been submitted to some
used.
type of concentration process.
The method is not necessarily suitable for latices from natural
5 Apparatus
sources other than Hevea brasiliensis or for synthetic rubber
latices, compounded latex, vulcanized latex or artificial disper-
The following apparatus is required when electrometric titration
sions of rubber.
is used :
5.1 pH-meter, equipped with glass electrode and saturated
2 References
calomel cell, and capable of being read to 0,02 unit.
IS0 123, Rubber latices - Sampling.
5.2 Glass electrode, of a type suitable for use in solutions of
IS0 976, Rubber latices - Determination of p
...

45
Norme internationale 125
INTERNATIONAL ORGANIZATION FOR STANDARDIZATION.ME~YHAPOLIHAR OPrAHHJAUMR il0 CTAHIIAPTH3AUHH.ORGANISATlON INTERNATIONALE DE NORMALISATION
Latex de caoutchouc - Dbtermination deJ'alcalinité
Rubber latex, natural - Determination of alkalinity
Troisieme 6dition - 1983-12-01
- CDU 678.031.5 : 543.241.2 R6f. no : IS0 125-1983 (FI
LL
Descripteurs : caoutchouc, latex, caoutchouc naturel, analyse chimique, dosage, alcalinit6.
8
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Avant- propos
L'ISO (Organisation internationale de normalisation) est une federation mondiale
d'organismes nationaux de normalisation (comit6s membres de I'ISO). L'Blaboration
des Normes internationales est confiBe aux comitBs techniques de I'ISO. Chaque
comitB membre intBress6 par une Btude a le droit de faire partie du comitB technique
correspondant. Les organisations internationales, gouvernementales et non gouverne-
mentales, en liaison avec I'ISO, participent Bgalement aux travaux.
Les projets de Normes internationales adoptes par les comitBs techniques sont soumis
aux comitBs membres pour approbation, avant leur acceptation comme Normes inter-
nationales par le Conseil de WO.
La Norme internationale IS0 125 a 6th BlaborBe par le comitB technique ISO/TC 45,
Eiastornkres et produits i) base d'6iastornkres.
Cette troisihme Bdition fut soumise directement au Conseil de I'ISO, conformBment au
paragraphe 6.11.2 de la partie 1 des Directives pour les travaux techniques de I'ISO.
Elle annule et remplace la deuxihme Bdition (IS0 125-1977), qui avait BtB approuvbe par
les comitC membres des pays suivants :
Afrique du Sud, RBp. d' France Sri Lanka
Hongrie Suede
Allemagne, R. F.
Australie Inde Suisse
Irlande TchBcoslovaquie
Autriche
Belgique Malaisie Turquie
Chili Nouvelle-ZBlande URSS
CorBe, RBp. de Pays-Bas USA
Égypte, RBp. arabe d' Roumanie
Espagne Royaume-Uni
Aucun comit6 membre ne l'avait d6sapprouvBe.
La deuxihme Bdition, qui annulait et remplaçait I'ISO 125-1974, incorporait un projet
d'Amendement qui avait BtB soumis aux comitBs membres en août 1976 et avait 6th
approuvB par les pays suivants :
Allemagne, R. F. France Roumanie
Autriche Hongrie Royaume-Uni
Belgique Inde Suhde
BrBsil Italie Turquie
Bulgarie Nouvelle-ZBlande URSS
Canada Pays-Bas USA
Espagne Pologne
Aucun comitB membre ne l'avait dBsapprouv6.
O Organisation internationale de normalisation, 1983 0
imprim6 en Suisse

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NORME INTERNATIONALE
IS0 125-1983 (F)
Latex de caoutchouc - Dbtermination de l'alcalinité
1 Objet et domaine d'application
4.3 Rouge de mbthyle, solution B 0,l % dans un Bthanol de
purete minimale 95 %.
La presente Norme internationale specifie une methode de
determination de I'alcalinit6 du latex de caoutchouc naturel
Cette solution n'est pas necessaire lorsque l'on effectue le
contenant des agents de preservation et qui a 6t6 soumis 8 un titrage par BlectromBtrie.
procede quelconque de concentration.
La methode ne convient pas necessairement aux latex d'origine
5 Appareillage
naturelle autres que celui de I'Hevea brasiliensis ou aux latex de
caoutchouc de synthbse, aux melanges de latex, au latex vulca-
L'appareillage suivant est necessaire pour le titrage par Blectro-
nise ou aux dispersions artificielles de caoutchouc.
metrie :
5.1 pH-mixre, B electrode en verre et cellule au calomel
2 References
sature, permettant la lecture B 0,02 unit6 prbs.
IS0 123, Latex d'Blastom&re - Echantillonnage.
5.2 Electrode en verre, de type convenant B l'utilisation
IS0 976, Latex de caoutchouc - DBtermination du pH. dans des solutions de pH allant jusqu'8 12,O.
Agitateur mbcanique, avec moteur mis B la terre et
5.3
3
...

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