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)

Publication date:   Feb 14, 2019

General information

60.60 Standard published   Dec 5, 2018

CEN

CEN/TC 230 Water analysis

European Norm

13.060.70   Examination of biological properties of water

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Scope

This document specifies techniques for preparing poorly water-soluble organic compounds (i.e. liquid and solid compounds) with a solubility in water of less than approximately 100 mg/l and introducing them into test vessels for a subsequent biodegradability test in an aqueous medium using standard methods.
The subsequent tests on biodegradability are primarily methods using the analysis of the released carbon dioxide described in ISO 9439 and the determination of the oxygen described in ISO 9408 and following the usual precautions for ISO 10707. Thus, one can notice that the methods measuring the removal of dissolved organic carbon (DOC) are not appropriate.
This document does not specify the biodegradation test methods. It is restricted to describing techniques for introducing the test compounds into the test medium and to keeping them in a dispersed state[4]. These techniques are implemented while observing the experimental conditions described in the standardized methods for evaluating biodegradability. ISO 9439, based on CO2 evolution, is not suitable for testing volatile compounds.
Some of the preparation methods described in this document might not be accepted by regulators for making conclusions on the ready biodegradability of tested compounds.
Examples of biodegradability curves are given in Annex A.

Life cycle

PREVIOUSLY

WITHDRAWN
EN ISO 10634:1995

NOW

PUBLISHED
EN ISO 10634:2018
60.60 Standard published
Dec 5, 2018