Plastics - Phenol-formaldehyde mouldings - Determination of free ammonia and ammonium compounds - Colorimetric comparison method (ISO 120:1977)

Specification of a semi-quantitative method. The content of free ammonia in a moulded article is of importance, when corrosion of metal inserts or contamination in contact with the article has to be considered. Distillation of the aqueous extract from a powdered test portion, coloration of the distillate by reaction with Nessler reagent and comparison of the colour with that of standard matching solutions.

Kunststoffe - Phenoplast-Formteile - Bestimmung von freiem Ammoniak und Ammoniumverbindungen - Colorimetrisches Vergleichsverfahren (ISO 120:1977)

Diese Internationale Norm beschreibt eine colorimetrische Vergleichsmethode für die halbquantitive Bestimmung des Gehaltes an Ammoniak in Phenoplast-Formteilen. ANMERKUNG: Diese Internationale Norm liefert keinen Absolutwert des vorhandenen Ammoniaks. Der Gehalt an Ammoniak in einem Formteil ist die Bedeutung, wenn mit der Korrosion von Metallteilen oder der Verunreinigung von Lebensmitteln im Kontakt mit dem Teil gerechnet werden muß.

Plastiques - Pieces moulées a base de phénoplastes - Dosage de l'ammoniac libre et des composés ammoniacaux - Méthode par comparaison colorimétrique (ISO 120:1977)

Polimerni materiali - Fenol-formaldehidni oblikovanci - Določevanje prostega amoniaka in amonijevih spojin - Kolorimetrična primerjalna metoda (ISO 120:1977)

General Information

Status
Published
Publication Date
30-Apr-2000
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
01-May-2000
Due Date
01-May-2000
Completion Date
01-May-2000

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SLOVENSKI STANDARD
SIST EN ISO 120:2000
01-maj-2000
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DPRQLDNDLQDPRQLMHYLKVSRMLQ.RORULPHWULþQDSULPHUMDOQDPHWRGD ,62
Plastics - Phenol-formaldehyde mouldings - Determination of free ammonia and
ammonium compounds - Colorimetric comparison method (ISO 120:1977)
Kunststoffe - Phenoplast-Formteile - Bestimmung von freiem Ammoniak und
Ammoniumverbindungen - Colorimetrisches Vergleichsverfahren (ISO 120:1977)

Plastiques - Pieces moulées a base de phénoplastes - Dosage de l'ammoniac libre et

des composés ammoniacaux - Méthode par comparaison colorimétrique (ISO 120:1977)
Ta slovenski standard je istoveten z: EN ISO 120:1998
ICS:
83.080.10 Duromeri Thermosetting materials
SIST EN ISO 120:2000 en

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN ISO 120:2000
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SIST EN ISO 120:2000
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SIST EN ISO 120:2000
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SIST EN ISO 120:2000
INTERNATIONAL STANDARD

INTERNATIONAL ORGANIZATION FOR STANDARDIZATION l MEXAYHAPOAHAII OPTAHM3AUW5I I-IO CTAHAAPTW3A~WW.ORGANISATION INTERNATIONALE DE NORMALISATION

Plastics - Phenol-formaldehyde mouldings - Determination
of free ammonia and ammonium compounds - Colorimetric
comparison method

Plastiques - Pikes moulkes 2 base de phenoptastes - Dosage de lfammoniac libre et des composk

ammoniacaux - ASthode par comparaison colorimetrique
First edition - 1977-10-01
UDC 678.632 : (546.171.1 + 547.298.1) : 543.8 Ref. No. ISO 120-1977 (E)

Descriptors : plastics, Phenol formaldehyde resins, mouldings, chemical analysis, determination of content, ammonia, colorimetric analysis,

comparison analysis.
Price based on 2 pages
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SIST EN ISO 120:2000
FOREWORD

ISO (the International Organization for Standardization) is a worldwide federation

of national Standards institutes (ISO member bodies). The work of developing
International Standards is carried out through ISO technical committees. Every
member body interested in a subject for which a technical committee has been set

up 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 ISO Council.
International Standard ISO 120 was developed by Technical Committee lSO/TC 61,
Plastics, and was circulated to the member bodies in October 1975.
lt has been approved by the member bodies of the following countries :
Austral ia Iran South Africa, Rep. of
Austria
Israel Spain
Belgium Italy Sweden
Brazil Japan Switzerland
Czechoslovakia Mexico Turkey
Finland Netherlands United Kingdom
France New Zealand U.S.A.
Germany Peru U.S.S. R.
Hungary Poland Yugoslavia
India Romania
No member body expressed disapproval of the document.
This International Standard cancels and replaces ISO Recommendation R 120-1959,
of which it constitutes a technical revision.
0 International Organkation for Standardization, 1977 e
Printed in Switzerland
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SIST EN ISO 120:2000
ISO 120-1977 (E)
INTERNATIONAL STANDARD
Plastics - Phenol-formaldehyde mouldings - Determination
of free ammonia and ammonium compounds - Colorimetric
comparison method
5 APPARATUS
1 SCOPE AND FIELD OF APPLICATION
Ordinary laboratory apparatus, and
This International Standard specifies a colorimetric
comparison method for the semi-quantitative determination
of the amount of ammonia in Phenol-formaldehyde
5.1 Means for reducing the mouldings to a powder.
mouldings.
5.2 Sieve, with nominal apertures of 250 ,um, conform-
NOTE - This International Standard does not provide an absolute
ing to ISO 565.
measure of the ammonia present.
The amount of ammonia in a moulded article is of
5.3 Balance, accurate to 0,Ol g.
importante when corrosion of metal inserts or contami-
nation of foodstuffs in contact with the article has to be
5.4 Glas+stoppered flask, 250 ml capacity.
considered.
5.5 Distillation apparatus, comprising a flask of 250 ml
capacity, splash head and a condenser.
2 REFERENCES
ISO 565, Test sieves - Woven me tal wire clo th and
5.6 Filter funnel, with hardened medium Speed filter
perfora ted pla te - Nominal sizes of apertures.
Paper.
ISO
...

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