FprEN ISO 20236
(Main)Water quality - Determination of total organic carbon (TOC), dissolved organic carbon (DOC), total bound nitrogen (TNb) and dissolved bound nitrogen (DNb) after high temperature catalytic oxidative combustion (ISO/FDIS 20236:2024)
Water quality - Determination of total organic carbon (TOC), dissolved organic carbon (DOC), total bound nitrogen (TNb) and dissolved bound nitrogen (DNb) after high temperature catalytic oxidative combustion (ISO/FDIS 20236:2024)
This document specifies a method for the determination of total organic carbon (TOC), dissolved organic carbon (DOC), total bound nitrogen (TNb) and dissolved bound nitrogen (DNb) in the form of free ammonia, ammonium, nitrite, nitrate and organic compounds capable of conversion to nitrogen oxides under the conditions described. The procedure is carried out instrumentally.
NOTE Generally the method can be applied for the determination of total carbon (TC) and total inorganic carbon (TIC), see Annex A.
The method is applicable to water samples (e.g. drinking water, raw water, ground water, surface water, sea water, waste water, leachates).
The method allows a determination of TOC and DOC ≥ 1 mg/l and TNb and DNb ≥ 1 mg/l. The upper working range is restricted by instrument-dependent conditions (e.g. injection volume). Higher concentrations can be determined after appropriate dilution of the sample.
For samples containing volatile organic compounds (e.g. industrial waste water), the difference method is used, see Annex A.
Cyanide, cyanate and particles of elemental carbon (soot), when present in the sample, can be determined together with the organic carbon.
The method is not appropriate for the determination of volatile, or purgeable, organic carbon under the conditions described by this method.
Dissolved nitrogen gas (N2) is not determined.
Wasserbeschaffenheit - Bestimmung des gesamten organischen Kohlenstoffs (TOC), des gelösten organischen Kohlenstoffs (DOC), des gebundenen Stickstoffs (TNb) und des gelösten gebundenen Stickstoffs (DNb) nach katalytischer oxidativer Hochtemperaturverbrennung (ISO/FDIS 20236:2024)
Dieses Dokument legt ein Verfahren zur Bestimmung des gesamten organischen Kohlenstoffs (TOC) und des gelösten organischen Kohlenstoffs (DOC) fest sowie des gesamten gebundenen Stickstoffs (TNb) und des gelösten gebundenen Stickstoffs (DNb), die in Form von freiem Ammoniak, Ammonium, Nitrit, Nitrat vorliegen oder in organischen Verbindungen, die unter den beschriebenen Bedingungen in Stickstoffoxide umgewandelt werden können. Das Analysenverfahren wird automatisiert durchgeführt.
ANMERKUNG Grundsätzlich kann das Verfahren für die Bestimmung des gesamten Kohlenstoffs (TC) und des gesamten anorganischen Kohlenstoffs (TIC) angewendet werden (siehe Anhang A).
Das Verfahren ist anwendbar für Wasserproben (z. B. Trinkwasser, Rohwasser, Grundwasser, Oberflächen¬wasser, Meerwasser, Abwasser, Sickerwässer).
Das Verfahren erlaubt die Bestimmung von TOC und DOC ≥ 1 mg/l und von TNb und DNb ≥ 1 mg/l. Nach oben ist der Arbeitsbereich durch geräteabhängige Bedingungen (z. B. Injektionsvolumen) begrenzt. Höhere Konzentrationen können nach entsprechender Verdünnung der Probe bestimmt werden. In Abhängigkeit des eingesetzten Geräts können bei Anwendung einer geeigneten Kalibrierung Konzentrationen < 1 mg/l bestimmt werden.
Bei Proben, die flüchtige organische Verbindungen enthalten (z. B. Industrieabwasser), kann die Anwendung des Differenzverfahrens in Betracht gezogen werden, siehe Anhang A.
Cyanid, Cyanat und Partikel aus elementarem Kohlenstoff (Ruß) können, falls in der Probe vorhanden, zusammen mit dem organischen Kohlenstoff erfasst werden.
Gelöster gasförmiger Stickstoff (N2) wird nicht erfasst.
Qualité de l'eau - Dosage du carbone organique total (COT), carbone organique dissous (COD), azote lié total (TNb) et azote lié dissous (DNb) après combustion catalytique oxydante à haute température (ISO/FDIS 20236:2024)
Le présent document spécifie une méthode de dosage du carbone organique total (COT), du carbone organique dissous (COD), de l'azote lié total (TNb) et de l'azote lié dissous (DNb) sous la forme d'ammoniac libre, ammonium, nitrites, nitrates et composés organiques pouvant être convertis en oxydes d'azote dans les conditions décrites. La procédure est réalisée au moyen d'instruments.
NOTE Généralement, cette méthode peut s'appliquer au dosage du carbone total (CT) et du carbone inorganique total (CIT), voir Annexe A.
Cette méthode s'applique aux échantillons d'eau (par exemple, eau destinée à la consommation humaine, eau brute, eau souterraine, eau de surface, eau de mer, eaux usées, lixiviats).
Cette méthode permet le dosage du COT et COD ≥ 1 mg/l et du TNb et DNb ≥ 1 mg/l. Le domaine d'analyse supérieur est restreint par les conditions liées aux instruments (par exemple, volume d'injection). Des concentrations supérieures peuvent être dosées après dilution adéquate de l'échantillon.
Pour les échantillons contenant des composés organiques volatils (par exemple, eaux résiduaires industrielles), la méthode par différence est utilisée, voir Annexe A.
Les cyanures, les cyanates et les particules de carbone élémentaire (suie), s'ils sont présents dans l'échantillon, peuvent être dosés avec le carbone organique.
Cette méthode ne convient pas au dosage du carbone organique volatil ou purgeable dans les conditions décrites par la présente méthode.
L'azote gazeux dissous (N2) n'est pas dosé.
Kakovost vode - Določevanje celotnega organskega ogljika (TOC), raztopljenega organskega ogljika (DOC), celotnega vezanega dušika (TNb) in raztopljenega vezanega dušika (DNb) po katalitskem sežigu pri visoki temperaturi (ISO/DIS 20236:2023)
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-november-2023
Kakovost vode - Določevanje celotnega organskega ogljika (TOC), raztopljenega
organskega ogljika (DOC), celotnega vezanega dušika (TNb) in raztopljenega
vezanega dušika (DNb) po katalitskem sežigu pri visoki temperaturi (ISO/DIS
20236:2023)
Water quality - Determination of total organic carbon (TOC), dissolved organic carbon
(DOC), total bound nitrogen (TNb) and dissolved bound nitrogen (DNb) after high
temperature catalytic oxidative combustion (ISO/DIS 20236:2023)
Wasserbeschaffenheit - Bestimmung des gesamten organischen Kohlenstoffs (TOC),
des gelösten organischen Kohlenstoffs (DOC), des gebundenen Stickstoffs (TNb) und
des gelösten gebundenen Stickstoffs (DNb) nach katalytischer oxidativer
Hochtemperaturverbrennung (ISO/DIS 20236:2023)
Qualité de l'eau - Dosage du carbone organique total (COT), carbone organique dissous
(COD), azote lié total (TNb) et azote lié dissous (DNb) après combustion catalytique
oxydante à haute température (ISO/DIS 20236:2023)
Ta slovenski standard je istoveten z: prEN ISO 20236
ICS:
13.060.50 Preiskava vode na kemične Examination of water for
snovi chemical substances
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
DRAFT INTERNATIONAL STANDARD
ISO/DIS 20236
ISO/TC 147/SC 2 Secretariat: DIN
Voting begins on: Voting terminates on:
2023-08-28 2023-11-20
Water quality — Determination of total organic carbon
(TOC), dissolved organic carbon (DOC), total bound
nitrogen (TN ) and dissolved bound nitrogen (DN ) after
b b
high temperature catalytic oxidative combustion
Qualité de l'eau — Dosage du carbone organique total (COT), carbone organique dissous (COD), azote lié
total (TN ) et azote lié dissous (DN ) après combustion catalytique oxydante à haute température
b b
ICS: 13.060.50
This document is circulated as received from the committee secretariat.
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENT AND APPROVAL. IT IS
ISO/CEN PARALLEL PROCESSING
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NATIONAL REGULATIONS.
ISO/DIS 20236:2023(E)
RECIPIENTS OF THIS DRAFT ARE INVITED
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NOTIFICATION OF ANY RELEVANT PATENT
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PROVIDE SUPPORTING DOCUMENTATION. © ISO 2023
ISO/DIS 20236:2023(E)
DRAFT INTERNATIONAL STANDARD
ISO/DIS 20236
ISO/TC 147/SC 2 Secretariat: DIN
Voting begins on: Voting terminates on:
Water quality — Determination of total organic carbon
(TOC), dissolved organic carbon (DOC), total bound
nitrogen (TN ) and dissolved bound nitrogen (DN ) after
b b
high temperature catalytic oxidative combustion
Qualité de l'eau — Dosage du carbone organique total (COT), carbone organique dissous (COD), azote lié
total (TN ) et azote lié dissous (DN ) après combustion catalytique oxydante à haute température
b b
ICS: 13.060.50
This document is circulated as received from the committee secretariat.
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENT AND APPROVAL. IT IS
© ISO 2023
ISO/CEN PARALLEL PROCESSING
THEREFORE SUBJECT TO CHANGE AND MAY
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
NOT BE REFERRED TO AS AN INTERNATIONAL
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WHICH REFERENCE MAY BE MADE IN
Reference number
Email: copyright@iso.org
NATIONAL REGULATIONS.
Website: www.iso.org ISO/DIS 20236:2023(E)
RECIPIENTS OF THIS DRAFT ARE INVITED
Published in Switzerland
TO SUBMIT, WITH THEIR COMMENTS,
NOTIFICATION OF ANY RELEVANT PATENT
RIGHTS OF WHICH THEY ARE AWARE AND TO
ii
PROVIDE SUPPORTING DOCUMENTATION. © ISO 2023
ISO/DIS 20236:2023(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 3
5 Interferences . 3
5.1 General . 3
5.2 TOC or DOC . 3
5.3 TN or DN . 4
b b
6 Reagents . 4
7 Apparatus . 7
8 Quality requirements for the analytical system. 8
8.1 System check . 8
8.2 Particle processing control . . 9
9 Sampling and sample preparation . 9
10 Procedure .10
10.1 General . 10
10.2 Calibration . 10
10.3 Validity check of the calibration function . 10
10.4 Measurement . 10
10.4.1 General . 10
10.4.2 Determination . 10
11 Evaluation .12
12 Expression of results .12
13 Test report .12
Annex A (normative) Determination of TOC and TIC applying the difference method.13
Annex B (informative) Performance data for TOC or DOC and TN or DN .16
b b
Annex C (informative) Alternative detection techniques for TN and DN .18
b b
Bibliography .19
iii
ISO/DIS 20236:2023(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.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).
I 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. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www.iso.org/patents).
Any trade name used in this document is information given for the convenience of users and does not
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For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to
the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see
www.iso.org/iso/foreword.html.
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).
This second edition cancels and replaces the first edition (ISO 20236:2018), which has been technically
revised.
The main changes are as follows:
— no need to report results with a HT prefix/suffix to indicate the High Temperature methode, removal
of indices;
— updated list of normative references;
— update of the application insertion of Clause A.6 Test Report in order to reference of the difference
method with the results report, obligatory;
— addition of widening of the method to apply single component standard calibration solutions e.g.
based on as ammonium sulfate or potassium nitrate, too;
— the general widening of the method to determine determination of concentrations <1 mg/l of C and
N is possible but dependent on instrument conditions chosen and applying appropriate calibration;
— editorially revised.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.
iv
ISO/DIS 20236:2023(E)
Introduction
Total organic carbon (TOC), dissolved organic carbon (DOC), total bound nitrogen (TN ) and dissolved
b
bound nitrogen (DN ) are an analytical convention, the respe
...
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