EN ISO 15682:2001

SLOVENSKI STANDARD
01-december-2001
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Water quality - Determination of chloride by flow analysis (CFA and FIA) and photometric
or potentiometric detection (ISO 15682:2000)
Wasserbeschaffenheit - Bestimmung von Chlorid mittels Fließanalyse (CFA und FIA)
und photometrischer oder potentiometrischer Detektion (ISO 15682:2000)
Qualité de l'eau - Dosage du chlorure par analyse en flux (CFA et FIA) et par détection
photométrique ou potentiométrique (ISO 15682:2000)
Ta slovenski standard je istoveten z: EN ISO 15682:2001
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 15682
NORME EUROPÉENNE
EUROPÄISCHE NORM
August 2001
ICS 13.060.50
English version
Water quality - Determination of chloride by flow analysis (CFA
and FIA) and photometric or potentiometric detection (ISO
15682:2000)
Qualité de l'eau - Dosage du chlorure par analyse en flux Wasserbeschaffenheit - Bestimmung von Chlorid mittels
(CFA et FIA) et par détection photométrique ou Fließanalyse (CFA und FIA) und photometrischer oder
potentiométrique (ISO 15682:2000) potentiometrischer Detektion (ISO 15682:2000)
This European Standard was approved by CEN on 18 June 2001.
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 Management Centre 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 Management Centre has the same status as the official
versions.
CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,
Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.
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Management Centre: rue de Stassart, 36  B-1050 Brussels
© 2001 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 15682:2001 E
worldwide for CEN national Members.

CORRECTED 2001-11-07
Foreword
The text of the International Standard from Technical Committee ISO/TC 147 "Water quality"
of the International Organization for Standardization (ISO) has been taken over as an
European Standard by 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 February 2002, and conflicting national
standards shall be withdrawn at the latest by February 2002.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of
the following countries are bound to implement this European Standard: Austria, Belgium,
Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy,
Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United
Kingdom.
Endorsement notice
The text of the International Standard ISO 15682:2000 has been approved by CEN as a
European Standard without any modifications.
NOTE: Normative references to International Standards are listed in annex ZA (normative).
Annex ZA (normative)
Normative references to international publications
with their relevant European publications
This European Standard incorporates by dated or undated reference, provisions from other
publications. These normative references are cited at the appropriate places in the text and the
publications are listed hereafter. For dated references, subsequent amendments to or revisions
of any of these publications apply to this European Standard only when incorporated in it by
amendment or revision. For undated references the latest edition of the publication referred to
applies (including amendments).
NOTE Where an International Publication has been modified by common modifications,
indicated by (mod.), the relevant EN/HD applies.
Publication Year Title EN Year
ISO 3696 1987 Water for analytical laboratory use - EN ISO 3696 1995
Specification and test methods
INTERNATIONAL ISO
STANDARD 15682
First edition
2000-07-15
Water quality — Determination of chloride
by flow analysis (CFA and FIA) and
photometric or potentiometric detection
Qualité de l'eau — Dosage du chlorure par analyse en flux (CFA et FIA) et
par détection photométrique ou potentiométrique
Reference number
ISO 15682:2000(E)
©
ISO 2000
ISO 15682:2000(E)
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ii © ISO 2000 – All rights reserved

ISO 15682:2000(E)
Contents Page
Foreword.iv
Introduction.v
1 Scope .1
2 Normative reference .1
3 Determination of chloride by flow analysis (FIA and CFA) with photometric detection.1
4 Determination of chloride by flow analysis (FIA and CFA) with potentiometric detection.7
5 Expression of results .10
6 Test report.10
Annex A (informative) Performance characteristics.12
Annex B (informative) Examples of flow diagrams.14
Annex C (informative) Determination of chloride by flow analysis (FIA and CFA) and potentiometric
detection with a single calibration function for the range 10 mg/l to 1 000 mg/l .20
Bibliography.21
ISO 15682:2000(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 3.
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 International Standard may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights.
International Standard ISO 15682 was prepared by Technical Committee ISO/TC 147, Water quality,
Subcommittee SC 2, Physical, chemical and biochemical methods.
Annexes A, B and C of this International Standard are for information only.
iv © ISO 2000 – All rights reserved

ISO 15682:2000(E)
Introduction
Methods using flow analysis automatize wet chemical procedures and are particularly suitable for the processing of
many analytes in water in large sample series at a high analysis frequency (up to 100 samples per hour).
Differentiation is required between flow injection analysis (FIA) [1, 2], and continuous flow analysis (CFA) [3]. Both
methods share the feature of automatic dosage of the sample into a flow system (manifold) where the analytes in
the sample react with the reagent solutions on their way through the manifold. The sample preparation may be
integrated in the manifold. The amount of reaction product is measured in a flow detector (e.g. photometer, or ion-
selective electrode). The detector produces a signal from which the concentration of the parameter is calculated.
It should be investigated whether and to what extent particular problems will require the specification of additional
marginal conditions.
INTERNATIONAL STANDARD ISO 15682:2000(E)
Water quality — Determination of chloride by flow analysis (CFA
and FIA) and photometric or potentiometric detection
1 Scope
This International Standard specifies two methods for the determination of chloride by flow analysis. The two basic
methods are covered in separate clauses as follows:
a) Clause 3: Determination of chloride by flow analysis and photometric detection.
b) Clause 4: Determination of chloride by flow analysis and potentiometric detection.
Both methods are applicable to the analysis of water and waste water (including leachates) containing chloride in
the concentration range from 1 mg/l to 1 000 mg/l. On a case-by-case basis the range of the analysis can be
changed.
After dilution, samples with a chloride concentration > 1 000 mg/l can also be analysed.
The method with potentiometric detection is also applicable to turbid and/or coloured samples.
NOTE From the ecological point of view, the potentiometric method is preferable because it avoids the use of toxic
reagents. When the photometric method is applied, volatile and solid wastes containing mercury should be discarded in
accordance with environmental regulations.
2 Normative reference
The following normative document contains provisions which, through reference in this text, constitute provisions of
this International Standard. For dated references, subsequent amendments to, or revisions of, this publication do
not apply. However, parties to agreements based on this International Standard are encouraged to investigate the
possibility of applying the most recent edition of the normative document indicated below. For undated references,
the latest edition of the normative document referred to applies. Members of ISO and IEC maintain registers of
currently valid International Standards.
ISO 3696:1987, Water for analytical laboratory use — Specification and test methods.
3 Determination of chloride by flow analysis (FIA and CFA) with photometric detection
3.1 Principle
When using FIA, the sample is injected into a continuous flowing carrier stream (water) through an injection valve.
When using CFA, the sample is pumped into the carrier stream via a peristaltic pump. Depending on the
concentration of the sample, the sample is diluted with water. A reagent solution (mercury thiocyanate iron(III)
nitrate solution), also pumped by the peristaltic pump, is then mixed with the sample stream. The thiocyanate,
which is liberated by the chloride, reacts with the iron(III) ions to form a red-coloured iron(III) thiocyanate complex
[4], [5], [6].
It is absolutely essential that the tests described in this International Standard be carried out by suitably qualified
staff.
ISO 15682:2000(E)
3.2 Interferences
The analysis is subject to interferences as follows:
a) chemicals which liberate thiocyanate (i.e. the mercury thiocyanate),
...