ISO 2454:1982

Rubber products — Determination of zinc content — EDTA titrimetric method

Produits en caoutchouc — Détermination de la teneur en zinc — Méthode titrimétrique à l'EDTA

General Information

• Status: Withdrawn
• Publication Date: 30-Nov-1982
• Withdrawal Date: 30-Nov-1982
• ICS: 83.060 - Rubber
• Technical Committee: ISO/TC 45 - Rubber and rubber products
• Drafting Committee: ISO/TC 45 - Rubber and rubber products
• Current Stage: 9599 - Withdrawal of International Standard
• Completion Date: 30-Mar-1995

Relations

• Revised: ISO 2454:1995 - Rubber products — Determination of zinc content — EDTA titrimetric method
• Effective Date: 15-Apr-2008

Standards Content (Sample)

International Standard 2454
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INTERNATIONAL ORGANIZATION FOR STANDARDIZATIONOMEWYHAPOLIHAR OPrAHH3AUHR il0 CTAH~4r4PrH3AUHH.oRGANlSATlON INTERNATIONALE DE NORMALISATION
Rubber products - Determination of zinc content -
e EDTA titrimetric method
Produits en caoutchouc - Détermination de la teneur en zinc - Méthode titrimétrique à I'EDTA
Second edition - 1982-12-01
- üi UDC 678.06:546.47 Ref. No. IS0 2464-1982 (E)
Descriptors : rubber, vulcanized rubber. chemical analysis, determination of content, zinc, volumetric analysis.
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Price based on 3 pages

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INTERNATIONAL STANDARD IS0 2464-1982 (E)
Rubber products - Determination of zinc content -
EDTA titrimetric method
Hydrochloric acid, e = 1,18 Mg/m3.
1 Scope and field of application 4.3
This International Standard specifies a titrimetric method using
ethylenedinitrilotetraacetic (EDTA) disodium salt for the deter-
Sulphuric acid, e = 1,84 Mg/m3.
4.4
mination of the zinc content of all rubber products.
The presence of lead, magnesium, iron, titanium, antimony,
4.5 Hydrofluoric acid, 48 % (m/m) solution.
silica, and silicates in the ash does not interfere with the deter-
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mination. The method is not applicable, however, if cobalt is
present.
4.6 Ammonium hydroxide, e = 0,91 Mg/m3 solution.
2 References
4.7 Buffer solution.
IS0 247, Rubber - Determination of ash.
Dissolve 60 g of acetic acid (CH3COOH) and 77 g of ammonium
IS0 38511, Laboratoryglassware - Burettes - Part 7: General
acetate (CH3COONH4) in water and dilute to 1 O00 cm321 with
requirements. 1 )
water.
3 Principle
4.8 Aluminium chloride, c(AIC13.6H20) = O, 1 mol/dm3
Incineration of a test portion and dissolution of the ash in
solution.
hydrochloric acid. Extraction of silica by treatment with
hydrofluoric and sulphuric acids. Addition of aluminium
Dissolve 2,42 g of aluminium chloride hexahydrate
chloride and aluminium fluoride to precipitate calcium and
(AIC13.6H20) in water and dilute to 100 cm3 with water.
magnesium as hexafluoroaluminates. Removal or reduction of
interference from iron, titanium and excess aluminium by the
formation of complexes with fluoride ion (interference from
4.9 Magnesium chloride, c(MgC1,.6H20) = 0,l mol/dmJ
large amounts of iron is further reduced by addition of
solution.
of the zinc with a standard
2,4-pentanedione). Titration
L
volumetric solution of EDTA disodium salt in the presence of
dithizone as indicatqr. Dissolve 2,03 g of magnesium chloride hexahydrate
to 100 cmJ with water.
(MgCI2.6H,O) in water and dilute
4 Reagents
4.10 Ammonium fluoride, c(NH4F) = 3 mol/dd solution.
All recognized health and safety precautions shall be
observed in the handling of chemicals listed and in per-
forming the analysis.
Dissolve 55,5 g of ammonium fluoride (NH4F) in water and
dilute to 500 cm3 with water.
During the analysis, u
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