ISO/FDIS 18127
(Main)Water quality — Determination of adsorbable organically bound fluorine, chlorine, bromine and iodine (AOF, AOCl, AOBr, AOI) — Method using combustion and subsequent ion chromatographic measurement
Water quality — Determination of adsorbable organically bound fluorine, chlorine, bromine and iodine (AOF, AOCl, AOBr, AOI) — Method using combustion and subsequent ion chromatographic measurement
Qualité de l’eau — Dosage des composés organiques adsorbables contenant du fluor, du chlore, du brome et de l’iode (AOF, AOCl, AOBr, AOI) — Méthode de combustion suivie d’un mesurage par chromatographie ionique
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FINAL DRAFT
International
Standard
ISO/TC 147/SC 2
Water quality — Determination
Secretariat: DIN
of adsorbable organically bound
Voting begins on:
fluorine, chlorine, bromine and
2025-09-04
iodine (AOF, AOCl, AOBr, AOI) —
Voting terminates on:
Method using combustion and
2025-10-30
subsequent ion chromatographic
measurement
Qualité de l’eau — Dosage des composés organiques adsorbables
contenant du fluor, du chlore, du brome et de l’iode (AOF, AOCl,
AOBr, AOI) — Méthode de combustion suivie d’un mesurage par
chromatographie ionique
RECIPIENTS OF THIS DRAFT ARE INVITED TO SUBMIT,
WITH THEIR COMMENTS, NOTIFICATION OF ANY
RELEVANT PATENT RIGHTS OF WHICH THEY ARE AWARE
AND TO PROVIDE SUPPOR TING DOCUMENTATION.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO
ISO/CEN PARALLEL PROCESSING LOGICAL, COMMERCIAL AND USER PURPOSES, DRAFT
INTERNATIONAL STANDARDS MAY ON OCCASION HAVE
TO BE CONSIDERED IN THE LIGHT OF THEIR POTENTIAL
TO BECOME STAN DARDS TO WHICH REFERENCE MAY BE
MADE IN NATIONAL REGULATIONS.
Reference number
FINAL DRAFT
International
Standard
ISO/TC 147/SC 2
Water quality — Determination
Secretariat: DIN
of adsorbable organically bound
Voting begins on:
fluorine, chlorine, bromine and
iodine (AOF, AOCl, AOBr, AOI) —
Voting terminates on:
Method using combustion and
subsequent ion chromatographic
measurement
Qualité de l’eau — Dosage des composés organiques adsorbables
contenant du fluor, du chlore, du brome et de l’iode (AOF, AOCl,
AOBr, AOI) — Méthode de combustion suivie d’un mesurage par
chromatographie ionique
RECIPIENTS OF THIS DRAFT ARE INVITED TO SUBMIT,
WITH THEIR COMMENTS, NOTIFICATION OF ANY
RELEVANT PATENT RIGHTS OF WHICH THEY ARE AWARE
AND TO PROVIDE SUPPOR TING DOCUMENTATION.
© ISO 2025
IN ADDITION TO THEIR EVALUATION AS
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO
ISO/CEN PARALLEL PROCESSING
LOGICAL, COMMERCIAL AND USER PURPOSES, DRAFT
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
INTERNATIONAL STANDARDS MAY ON OCCASION HAVE
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
TO BE CONSIDERED IN THE LIGHT OF THEIR POTENTIAL
or ISO’s member body in the country of the requester.
TO BECOME STAN DARDS TO WHICH REFERENCE MAY BE
MADE IN NATIONAL REGULATIONS.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland Reference number
ii
Contents Page
Foreword .v
Introduction .vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Interferences . 3
4.1 Interference during adsorption .3
4.2 Interferences during combustion .3
4.3 Interferences during ion chromatography .3
5 Principle . 3
6 Reagents . 4
7 Apparatus and materials . 8
8 Sampling and sample preparation .11
8.1 General .11
8.2 Sampling for the AOF determination . 12
8.3 Sampling for the AOCl-, AOBr- and AOI determination . 12
8.4 Further procedure of sample preparation . 12
8.4.1 AOF determination . 12
8.4.2 AOCl, AOBr and AOI determination. 12
9 Procedure .12
9.1 Preliminary test . 12
9.2 Homogenization. 13
9.3 Sample preparation . 13
9.3.1 General . 13
9.3.2 Test sample for the AOF determination . 13
9.3.3 Test samples for the AOCl, AOBr and AOI determination . 13
9.4 Adsorption on activated carbon . 13
9.4.1 Adsorption procedure . 13
9.4.2 Washing of the activated carbon for the AOF determination .14
9.4.3 Washing of the activated carbon for the AOCl, AOBr, AOI determination .14
9.5 Additional procedure for samples containing suspended solids .14
9.6 Blank determination .14
9.6.1 AOF blank determination .14
9.6.2 AOCl, AOBr and AOI blank determination .14
9.7 Operation of the ion chromatography system . 15
9.7.1 General . 15
9.7.2 Calibration . . . 15
9.7.3 Checking the ion chromatography . 15
9.8 Combustion and absorption . 15
9.9 Measurement of the absorption solution . 15
10 Validation of the overall procedure . .16
10.1 Initial check .16
10.2 Daily check .16
10.3 Test to determine the completeness of the adsorption .16
11 Selection of usable analytical results .16
12 Calculation .16
13 Expression of the results .18
14 Test report .18
iii
Annex A (normative) Determination of adsorbable organically bound fluorine (AOF) . 19
Annex B (normative) Determination of adsorbable organically bound chlorine (AOCl) .22
Annex C (normative) Determination of adsorbable organically bound bromine (AOBr) .25
Annex D (normative) Determination of the adsorbable organically bound iodine (AOI) .29
Annex E (informative) Determination of adsorbable organically bound fluorine, chlorine,
bromine and iodine using the shaking procedure (SH-AOF, SH-AOCl, SH-AOBr and SH-
AOI) .32
Annex F (informative) Determination of adsorbable organically bound fluorine, chlorine,
bromine and iodine in waters with high halide contents after solid phase extraction
(SPE-AOF, SPE-AOCl, SPE-AOBr, SPE-AOI) .35
Annex G (normative) Test to determine the completeness of the adsorption by individual
combustion of the activated carbons from the multiple determinations and separate
absorption .38
Annex H (normative) Test to determine the completeness of the adsorption by common
combustion of the activated carbons from different dilution levels .39
Annex I (normative) Test to determine the completeness of the adsorption by adsorption on
columns connected in series with different quantities of adsorption columns .40
Annex J (normative) Calculation of the CIC-AOX from the AOCl, AOBr and AOI results added
(Cl)
according to Annex B, Annex C and Annex D.
...
ISO/TC 147/SC 2
Secretariat: DIN
Date: 2025-04-2508-20
Water quality — Determination of adsorbable organically bound
fluorine, chlorine, bromine and iodine (AOF, AOCl, AOBr, AOI) —
Method using combustion and subsequent ion chromatographic
measurement
Qualité de l'eaul’eau — Dosage des composés organiques adsorbables contenant du fluor, du chlore, du brome
et de l'iode adsorbables liés organiquementl’iode (AOF, AOCl, AOBr, AOI) — Méthode en utilisant lade
combustion et la mesure ultérieuresuivie d’un mesurage par chromatographie ionique
FDIS stage
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication
may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying,
or posting on the internet or an intranet, without prior written permission. Permission can be requested from either ISO
at the address below or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: + 41 22 749 01 11
EmailE-mail: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii
Contents
Foreword . v
Introduction . vi
1 Scope . 1
2 Normative references . 2
3 Terms and definitions . 2
4 Interferences . 3
4.1 Interference during adsorption . 3
4.2 Interferences during combustion . 4
4.3 Interferences during ion chromatography . 4
5 Principle . 4
6 Reagents . 5
7 Apparatus and materials . 9
8 Sampling and sample preparation . 14
8.1 General. 14
8.2 Sampling for the AOF determination . 14
8.3 Sampling for the AOCl-, AOBr- and AOI determination . 15
8.4 Further procedure of sample preparation . 15
9 Procedure . 15
9.1 Preliminary test . 15
9.2 Homogenization . 15
9.3 Sample preparation . 16
9.4 Adsorption on activated carbon . 16
9.5 Additional procedure for samples containing suspended solids . 17
9.6 Blank determination . 17
9.7 Operation of the ion chromatography system. 18
9.8 Combustion and absorption . 18
9.9 Measurement of the absorption solution . 19
10 Validation of the overall procedure . 19
10.1 Initial check . 19
10.2 Daily check . 19
10.3 Test to determine the completeness of the adsorption . 19
11 Selection of usable analytical results . 20
12 Calculation . 20
13 Expression of the results . 22
14 Test report . 22
Annex A (normative) Determination of adsorbable organically bound fluorine (AOF) . 23
Annex B (normative) Determination of adsorbable organically bound chlorine (AOCl) . 26
Annex C (normative) Determination of adsorbable organically bound bromine (AOBr) . 29
Annex D (normative) Determination of the adsorbable organically bound iodine (AOI) . 33
Annex E (informative) Determination of adsorbable organically bound fluorine, chlorine,
bromine and iodine using the shaking procedure (SH-AOF, SH-AOCl, SH-AOBr and SH-
AOI) . 37
iii
Annex F (informative) Determination of adsorbable organically bound fluorine, chlorine,
bromine and iodine in waters with high halide contents after solid phase extraction
(SPE-AOF, SPE-AOCl, SPE-AOBr, SPE-AOI) . 40
Annex G (normative) Test to determine the completeness of the adsorption by individual
combustion of the activated carbons from the multiple determinations and separate
absorption . 44
Annex H (normative) Test to determine the completeness of the adsorption by common
combustion of the activated carbons from different dilution levels . 45
Annex I (normative) Test to determine the completeness of the adsorption by adsorption on
columns connected in series with different quantities of adsorption columns . 46
Annex J (normative) Calculation of the CIC-AOX from the AOCl, AOBr and AOI results added
(Cl)
according to Annex B, Annex C and Annex D . 47
Annex K (informative) Performance data . 48
Bibliography . 50
iv
Foreword
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ISO documentsdocument should be noted. This document was drafted in accordance with the editorial rules
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Attention is drawnISO draws attention to the possibility that some of the elementsimplementation of this
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This document was prepared by Technical Committee ISO/TC 147, Water quality, Subcommittee SC 2,
Physical, chemical and biochemical methods., in collaboration with the European Committee for
Standardization (CEN) Technical Committee CEN/TC 230, Water analysis, in accordance with the Agreement
on technical cooperation between ISO and CEN (Vienna Agreement).
Any feedback or questions on this document should be directed to the user’s national standards body. A
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v
Introduction
Adsorbable organically bound fluorine, chlorine, bromine or iodine are analytical convention parameters used
to monitor water quality. They represent the sum of organically bound fluorine, chlorine, bromine and iodine
that can be adsorbed on activated carbon under specified conditions and, if the sample has not been filtered,
can also be attached to or contained in suspended substances.
In contrast to the AOXadsorbable organically bound halogen (AOX) method according to ISO 9562, this
method can be applied to determine the sum of organofluorine compounds in addition to the determination
of organically bound chlorine, bromine and iodine and detected halogen-specific separately.
The method is carried out by combustion ion chromatography (CIC).
Procedures for each separate parameter are described in Annex A, Annex B, Annex C and Annex D.
Alternatively, the adsorption of the organic substances contained in the water sample on activated carbon can
also be carried out by the shaking method (see Annex E).
Samples with a high content of suspended solids can be analysed using the shaking method (see Annex E).
Samples with a high content of inorganic halides can be analysed using the solid phase extraction (SPE)
method (see Annex F).
Results for samples analysed according to Annex E (shaking procedure) or Annex F (SPE procedure) can differ
significantly from those of the method specified in the main part.
With some waters, interference can occur that cannot be eliminated. These waters cannot be measured with
the method.
The AOCl, AOBr and AOI results according to Annex B, Annex C and Annex D can also be reported as
adsorbable organically bound halogen determined by combustion ion chromatography (CIC-AOX) (see
Annex J).
vi
Water quality — Determination of adsorbable organically bound
fluorine, chlorine, bromine and iodine (AOF, AOCl, AOBr, AOI) —
Method using combustion and subsequent ion chromatographic
measurement
WARNING — Persons using this document should be familiar with normal laboratory practice. This
document 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.
IMPORTANT — It is absolutely essential that tests conducted in accordance wi
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