EN ISO 9562:2004

SLOVENSKI STANDARD
01-februar-2005
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SIST EN 1485:1997
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Water quality - Determination of adsorbable organically bound halogens (AOX) (ISO
9562:2004)
Wasserbeschaffenheit - Bestimmung absorbierbarer organisch gebundener Halogene
(AOX) (ISO 9562:2004)
Qualité de l'eau - Dosage des composés organiques halogénés adsorbables (AOX) (ISO
9562:2004)
Ta slovenski standard je istoveten z: EN ISO 9562:2004
ICS:
13.060.50 3UHLVNDYDYRGHQDNHPLþQH Examination of water for
VQRYL chemical substances
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN ISO 9562
NORME EUROPÉENNE
EUROPÄISCHE NORM
September 2004
ICS 13.060.50 Supersedes EN 1485:1996
English version
Water quality - Determination of adsorbable organically bound
halogens (AOX) (ISO 9562:2004)
Qualité de l'eau - Dosage des composés organiques Wasserbeschaffenheit - Bestimmung absorbierbarer
halogénés adsorbables (AOX) (ISO 9562:2004) organisch gebundener Halogene (AOX) (ISO 9562:2004)
This European Standard was approved by CEN on 2 September 2004.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European
Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national
standards may be obtained on application to the Central Secretariat or to any CEN member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official
versions.
CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,
Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia,
Slovenia, Spain, Sweden, Switzerland and United Kingdom.
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© 2004 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 9562:2004: E
worldwide for CEN national Members.

Foreword
This document (EN ISO 9562:2004) has been prepared by Technical Committee ISO/TC 147
"Water quality" in collaboration with Technical Committee CEN/TC 230 "Water analysis", the
secretariat of which is held by DIN.

This European Standard shall be given the status of a national standard, either by publication of
an identical text or by endorsement, at the latest by March 2005, and conflicting national
standards shall be withdrawn at the latest by March 2005.

This document supersedes EN 1485:1996.

According to the CEN/CENELEC Internal Regulations, the national standards organizations of
the following countries are bound to implement this European Standard: Austria, Belgium,
Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary,
Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland,
Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.

Endorsement notice
The text of ISO 9562:2004 has been approved by CEN as EN ISO 9562:2004 without any
modifications.
INTERNATIONAL ISO
STANDARD 9562
Third edition
2004-09-15
Water quality — Determination of
adsorbable organically bound halogens
(AOX)
Qualité de l'eau — Dosage des composés organiques halogénés
adsorbables (AOX)
Reference number
ISO 9562:2004(E)
©
ISO 2004
ISO 9562:2004(E)
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ii © ISO 2004 – All rights reserved

ISO 9562:2004(E)
Contents Page
Foreword. iv
Introduction . v
1 Scope. 1
2 Normative references . 1
3 Terms and definitions. 1
4 Interferences. 2
5 Principle . 2
6 Reagents . 2
7 Apparatus. 4
8 Sampling and sample pre-treatment. 6
9 Procedure. 7
10 Calculation. 11
11 Precision . 11
12 Test report. 12
Annex A (informative) Determination of dissolved adsorbable organically bound halogens after
solid phase extraction (SPE-AOX) in waters with high salt content . 13
Annex B (informative) Handling of activated carbon. 18
Annex C (informative) Statistical performance characteristics . 19
Bibliography . 21

ISO 9562:2004(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies
(ISO member bodies). The work of preparing International Standards is normally carried out through ISO
technical committees. Each member body interested in a subject for which a technical committee has been
established 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. ISO collaborates closely with the
International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 9562 was prepared by Technical Committee ISO/TC 147, Water quality, Subcommittee SC 2, Physical,
chemical and biochemical methods.
This third edition cancels and replaces the second edition (ISO 9562:1998), which has been technically
revised.
iv © ISO 2004 – All rights reserved

ISO 9562:2004(E)
Introduction
Adsorbable organically bound halogens (AOX) is an analytical convention. The result is a parameter used for
water quality control purposes. It represents the sum of organically bound chlorine, bromine and iodine (but
not fluorine) that can be adsorbed on activated carbon under specified conditions and, if the sample is not
filtered, includes that associated with suspended matter.
The user should be aware that particular problems could require the specification of additional marginal
conditions.
INTERNATIONAL STANDARD ISO 9562:2004(E)

Water quality — Determination of adsorbable organically bound
halogens (AOX)
WARNING — Persons using this International Standard should be familiar with normal laboratory
practice. This International Standard does not purport to address all of the safety problems, if any,
associated with its use. It is the responsibility of the user to establish appropriate safety and health
practices and to ensure compliance with any national regulatory conditions.
IMPORTANT — It is absolutely essential that tests conducted according to this International Standard
be carried out by suitably qualified staff.
1 Scope
This International Standard specifies a method for the direct determination of an amount of usually 10 µg/l in
water of organically bound chlorine, bromine and iodine (expressed as chloride) adsorbable on activated
carbon.
This method is applicable to test samples (see 9.2) with concentrations of inorganic chloride ions of less than
1 g/l. Samples with higher concentrations are diluted prior to analysis.
This method is also applicable to samples containing suspended solids where halogens are adsorbed onto the
solid matter (e.g. insoluble halides). Filtration of the sample before analysis allows the separate determination
of dissolved and particulate adsorbable organically bound halogens (AOX).
Filtered samples with high inorganic chloride content can be analysed by a modified method [dissolved
adsorbable organically bound halogens after solid phase extraction in waters with high salt content (SPE-
AOX)] (see Annex A). However, results obtained by this modified method can differ significantly from those of
the required method.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
ISO 1773:1997, Laboratory glassware — Narrow-necked boiling flasks
ISO 3696:1987, Water for analytical laboratory use — Specification and test methods
3 Terms and definitions
For the purpose of this document, the following terms and definitions apply.
3.1
adsorbable organically bound halogens
AOX
equivalent amount of chlorine, bromine, and iodine contained in organic compounds, expressed as chloride
when determined according to this International Standard
ISO 9562:2004(E)
3.2
dissolved organic carbon
DOC
amount of organically bound carbon present in water originating from compounds passing through a
membrane filter of 0,45 µm pore size and including cyanate and thiocyanate
4 Interferences
4.1 High AOX values can result from the presence of active chlorine and of some inorganic bromine and
iodine compounds, irreversibly bound to activated carbon. Reactions of these oxidizing agents with organic
substances in the sample and with the activated carbon can be prevented by the addition of sodium sulfite,
immediately after sampling.
4.2 Organic bromine and iodine compounds may, during combustion, decompose to elemental bromine or
iodine respectively and this can yield higher oxidation states of these elements. These fractions of AOX may
be incompletely determined, thus leading to negative bias.
4.3 Samples containing living cells (for example microorganisms or algae) may give rise to high results
because of their chloride content. In these cases, the sample is not analysed until at least 8 h after
acidification.
4.4 For samples with high chloride
...