EN ISO 10634:1995

Water quality - Guidance for the preparation and treatment of poorly water-soluble organic compounds for the subsequent evaluation of their biodegradability in an aqueous medium (ISO 10634:1995)

Restricted to the description of the four techniques for introducing the poorly-soluble organic test compounds for a subsequent test on biodegradability in an aqueous medium. The techniques are: direct addition, which is restricted to non-volatile compounds, ultrasonic dispersion of non-volatile liquid and solid compounds, adsorption on an inert support and dispersions or emulsions with an emulsifying agent. Volatile chemicals may not be tested.

Wasserbeschaffenheit - Anleitung für die Vorbereitung und Behandlung von in Wasser schwer löslichen organischen Verbindungen für die nachfolgende Bestimmung ihrer biologischen Abbaubarkeit in einem wäßrigen Medium (ISO 10634:1995)

Diese Anleitung beschreibt folgende vier Verfahren zur Dispergierung organischer Verbindungen, die auf biologische Abbaubarkeit in einem wässrigen Medium geprüft werden sollen und die nicht genügend wasserlöslich sind, um einen Test auf die übliche Weise durchzuführen: - direkte Zugabe, diese Technik ist auf nicht flüchtige Testsubstanzen begrenzt; - Dispergierung mit Ultraschall, diese Technik kann für flüssige Substanzen und solche mit einem niedrigen Schmelzpunkt verwendet werden, sofern sie nicht flüchtig sind; - Adsorption an ein inertes Trägermaterial

Qualité de l'eau - Lignes directrices pour la préparation et le traitement des composés organiques peu solubles dans l'eau en vue de l'évaluation de leur biodégradabilité en milieu aqueux (ISO 10634:1995)

La présente Norme internationale décrit quatre techniques pour la préparation des composés organiques peu solubles dans l'eau et leur introduction dans des récipients d'essai en vue d'essais de biodégradabilité en milieu aqueux selon des méthodes normalisées. Les composés à expérimenter en question ne sont pas suffisamment solubles dans l'eau pour être soumis aux essais de biodégradabilité classiques, comme décrit dans les méthodes d'essai respectives citées dans l'article 2. Les techniques de préparation sont les suivantes: -- addition directe (article 3): cette technique est réservée aux composés d'essai non volatils, si des solvants ou des supports inertes sont utilisés; -- dispersion aux ultrasons (article 4): cette technique peut être appliquée aux composés liquides non volatils et aux composés solides; -- adsorption sur un support inerte (article 5); -- dispersion ou émulsion par un émulsifiant (article 6). Les essais ultérieurs de biodégradabilité sont principalement effectués par analyse du dioxyde de carbone dégagé (voir ISO 9439) et par détermination de la consommation d'oxygène (voir ISO 9408). La présente Norme internationale ne reprend pas la description de ces méthodes; elle se limite à la description des techniques d'introduction des substances expérimentées dans le milieu d'essai et au maintien de ces substances à 383l'état dispersé. La mise en oeuvre de ces techniques doit être réalisée en respectant par ailleurs les conditions expérimentales décrites dans les méthodes normalisées pour l'évaluation de la biodégradabilité. Il convient de noter que les produits chimiques volatils ne peuvent être expérimentés suivant la méthode du dioxyde de carbone prescrite dans l'ISO 9439.

Kakovost vode - Navodilo za pripravo in obdelavo v vodi slabo topnih organskih spojin za nadaljnje vrednotenje njihove biorazgradljivosti v vodi (ISO 10634:1995)

General Information

• Status: Withdrawn
• Publication Date: 31-Jul-1995
• Withdrawal Date: 04-Dec-2018
• ICS: 13.060.30 - Sewage water
• Technical Committee: CEN/TC 230 - Water analysis
• Drafting Committee: CEN/TC 230 - Water analysis
• Current Stage: 9960 - Withdrawal effective - Withdrawal
• Completion Date: 05-Dec-2018
• Ref Project: SIST EN ISO 10634:1999 - Water quality - Guidance for the preparation and treatment of poorly water-soluble organic compounds for the subsequent evaluation of their biodegradability in an aqueous medium (ISO 10634:1995)

Relations

• Replaced By: EN ISO 10634:2018 - Water quality - Preparation and treatment of poorly water-soluble organic compounds for the subsequent evaluation of their biodegradability in an aqueous medium (ISO 10634: 2018)
• Effective Date: 04-May-2016

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN ISO 10634:1999
01-marec-1999
Kakovost vode - Navodilo za pripravo in obdelavo v vodi slabo topnih organskih
spojin za nadaljnje vrednotenje njihove biorazgradljivosti v vodi (ISO 10634:1995)
Water quality - Guidance for the preparation and treatment of poorly water-soluble
organic compounds for the subsequent evaluation of their biodegradability in an aqueous
medium (ISO 10634:1995)
Wasserbeschaffenheit - Anleitung für die Vorbereitung und Behandlung von in Wasser
schwer löslichen organischen Verbindungen für die nachfolgende Bestimmung ihrer
biologischen Abbaubarkeit in einem wäßrigen Medium (ISO 10634:1995)
Qualité de l'eau - Lignes directrices pour la préparation et le traitement des composés
organiques peu solubles dans l'eau en vue de l'évaluation de leur biodégradabilité en
milieu aqueux (ISO 10634:1995)
Ta slovenski standard je istoveten z: EN ISO 10634:1995
ICS:
13.060.70 Preiskava bioloških lastnosti Examination of biological
vode properties of water
SIST EN ISO 10634:1999 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN ISO 10634:1999
0 ISO
ISO 10634:1995(E)
Introduction
The standardizing work carried out by lSO/TC ‘l47/SC 5 has shown that
the development of a Single method for evaluating the biodegradability of
organic compounds with a low solubility in water may not be envisaged
in the immediate future. In fact, the selection of the most suitable working
method to obtain a satisfactory emulsion or dispersion of these com-
pounds in the test media depends particularly on their physico-Chemical
properties. Consequently, the selection of the most suitable method has
to be left to the judgement of laboratories responsible for the tests based
on their experience and the product information supplied by the applicant.
lt is for this reason that this International Standard describes various
techniques for treating poorly soluble organic compounds before they are
investigated in biodegradability tests, with the aim of reaching a Stage
where, for any given technique, the same working method is used by all
laboratories, thus making it easier to compare results.
The techniques described in this International Standard do not necessarily
produce the Same results if they are used in parallel. The use of solvents
and dispersing or emulsifying techniques may be additional sources of
errors and may lead to test results which differ from those obtained
without using these techniques. Furthermore, dispersions or emulsions
may be produced which would not exist as such in nature and where the
rate and degree of biodegradability is enhanced because very fine particles
are present. These facts have to be considered for the evaluation and in-
terpretation of the results of biodegradation tests. lt is recommended to
perform biodegradability tests first, with the direct addition of a test com-
pound, or to perform this test in parallel to tests using dispersion tech-
niques.
Normally, only pure or virtually pure compounds should be tested. If mix-
tures or multi-componental substances are tested, the use of solvents and
dispersion techniques may lead to unrepresentative heterogeneous dis-
tributions and to misleading test results in the subsequent biodegradability
tests.

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SIST EN ISO 10634:1999
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SIST EN ISO 10634:1999
INTERNATIONAL STANDARD 0 ISO ISO 10634:1995(E)
Water quality - Guidance for the preparation and
treatment of poorly water-soluble organic compounds
for the subsequent evaluation of their biodegradability
in an aqueous medium
volatile chemicals may not be tested by the carbon
1 Scope
dioxide method specified in ISO 9439.
This International Standard describes four techniques
2 Normative references
for preparing poorly water-soluble organic compounds
and introducing them into test vessels for a sub-
The following Standards contain provisions which,
sequent test on biodegradability in an aqueous me-
through reference in this text, constitute provisions
dium using Standard methods. The test compounds
of this International Standard. At the time of publica-
concerned are not sufficiently soluble in water to
tion, the editions indicated were valid. All Standards
perform the biodegradability tests in the normal man-
are subject to revision, and
...