EN ISO 6326-1:2009

Natural gas - Determination of sulfur compounds - Part 1: General introduction (ISO 6326-1:2007)

ISO 6326-1:2007 gives a brief description of standardized methods that can be used for the determination of sulfur compounds in natural gas.
The principle of each method is described generally, the range of concentrations for which the method is suitable is indicated, and the analytical range and precision of each method is given. It should enable the user to select judiciously the proper method for the application being considered. Sulfur analysis is performed in order to determine total sulfur, sulfur contained in specific groups [e.g. thiols (mercaptans)], individual sulfur compounds and specific groups of sulfur compounds.
The available standardized methods in the field of sulfur analysis are the Wickbold combustion method for total sulfur determination (ISO 4260); the Lingener combustion method for total sulfur determination (ISO 6326-5); gas chromatography for determination of individual sulfur compounds (ISO 19739); potentiometry for determination of hydrogen sulfide, carbonyl sulfide and thiol compounds (ISO 6326-3).

Erdgas - Bestimmung von Schwefelverbindungen - Teil 1: Allgemeine Einleitung (ISO 6326-1:2007)

Dieser Teil von ISO 6326 enthält eine Übersicht über die genormten Verfahren, die zur Bestimmung von
Schwefelverbindungen in Erdgas angewendet werden können.
Für jedes Verfahren wird die allgemeine Kurzbeschreibung angegeben, und es werden jeweils der
Konzentrationsbereich, für den das Verfahren geeignet ist sowie die Empfindlichkeit und die Präzision
angegeben. Mit diesen Daten sollte es dem Anwender möglich sein, das für die jeweilige Anwendung
geeignete Verfahren auszuwählen. Eine Analyse des Schwefels wird durchgeführt zur:
a) Bestimmung des Gesamtschwefels;
b) Bestimmung des Schwefels, der in bestimmten Gruppen enthalten ist (z. B. Mercaptanschwefel);
c) Bestimmung einzelner Schwefelverbindungen;
d) Bestimmung bestimmter Gruppen von Schwefelverbindungen.
Zur Schwefelbestimmung sind folgende genormte Verfahren verfügbar:
Verbrennungsverfahren nach Wickbold: zur Bestimmung des Gesamtschwefels (ISO 4260);
Verbrennungsverfahren nach Lingener: zur Bestimmung des Gesamtschwefels (ISO 6326-5);
gaschromatographisches Verfahren: zur Bestimmung einzelner Schwefelverbindungen (ISO 19739);
potentiometrisches Verfahren: zur Bestimmung von Schwefelwasserstoff, Kohlenstoffoxidsulfidschwefel
und Mercaptanschwefel (ISO 6326-3).
Es gibt weitere Verfahren zur Bestimmung von Schwefelverbindungen, die hier jedoch nicht behandelt
werden. Tabelle 1 bietet einen Überblick über die genormten Verfahren, die zur Bestimmung von Gesamtschwefel,
Schwefelwasserstoff, Kohlenstoffoxidsulfidschwefel, Tetrahydrothiophen, Mercaptanschwefel,
einzelnen Mercaptanen, einzelnen Thiophenen, einzelnen organischen Sulfiden und Disulfiden angewendet
werden können.

Gaz naturel - Détermination des composés soufrés - Partie 1: Introduction générale (ISO 6326-1:2007)

L'ISO 6326-1:2007 donne une brève description des méthodes normalisées pouvant être utilisées pour la détermination des composés soufrés présents dans le gaz naturel.
Le principe de chaque méthode est décrit de façon générale. La plage de concentrations pour laquelle la méthode est appropriée est indiquée, ainsi que la sensibilité et la fidélité de chaque méthode. Cela devrait permettre aux utilisateurs de choisir judicieusement la méthode convenant le mieux à l'application considérée. La détermination des composés soufrés est réalisée en vue de déterminer le soufre total, le soufre renfermé dans des groupes spécifiques [par exemple, thiols (mercaptans)], les composés soufrés individuels et les groupes spécifiques de composés soufrés.
Les méthodes normalisées disponibles pour la détermination du soufre sont la méthode de combustion Wickbold, pour la détermination du soufre total (ISO 4260); la méthode de combustion Lingener, pour la détermination du soufre total (ISO 6326-5); la chromatographie en phase gazeuse, pour la détermination des composés soufrés individuels (ISO 19739); et la potentiométrie, pour la détermination du sulfure d'hydrogène, du sulfure de carbonyle et des thiols (ISO 6326-3).

Zemeljski plin - Določevanje žveplovih spojin - 1. del: Splošni uvod (ISO 6326-1:2007)

General Information

• Status: Withdrawn
• Publication Date: 07-Jul-2009
• Withdrawal Date: 11-Feb-2020
• ICS: 75.060 - Natural gas
• Technical Committee: CEN/TC 238 - Test gases, test pressures and categories of appliances
• Drafting Committee: CEN/SS N21 - Gaseous fuels and combustible gas
• Current Stage: 9960 - Withdrawal effective - Withdrawal
• Completion Date: 12-Feb-2020
• Ref Project: SIST EN ISO 6326-1:2009 - Natural gas - Determination of sulfur compounds - Part 1: General introduction (ISO 6326-1:2007)

Standards Content (Sample)

SLOVENSKI STANDARD
01-september-2009
=HPHOMVNLSOLQ'RORþHYDQMHåYHSORYLKVSRMLQGHO6SORãQLXYRG,62

Natural gas - Determination of sulfur compounds - Part 1: General introduction (ISO
6326-1:2007)
Erdgas - Bestimmung von Schwefelverbindungen - Teil 1: Allgemeine Einleitung (ISO
6326-1:2007)
Gaz naturel - Détermination des composés soufrés - Partie 1: Introduction générale (ISO
6326-1:2007)
Ta slovenski standard je istoveten z: EN ISO 6326-1:2009
ICS:
75.060 Zemeljski plin Natural gas
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN ISO 6326-1
NORME EUROPÉENNE
EUROPÄISCHE NORM
July 2009
ICS 75.060
English Version
Natural gas - Determination of sulfur compounds - Part 1:
General introduction (ISO 6326-1:2007)
Gaz naturel - Détermination des composés soufrés - Partie Erdgas - Bestimmung von Schwefelverbindungen - Teil 1:
1: Introduction générale (ISO 6326-1:2007) Allgemeine Einleitung (ISO 6326-1:2007)
This European Standard was approved by CEN on 20 June 2009.
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 CEN 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 CEN Management Centre has the same status as the
official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,
Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2009 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 6326-1:2009: E
worldwide for CEN national Members.

Contents Page
Foreword .3

Foreword
The text of ISO 6326-1:2007 has been prepared by Technical Committee ISO/TC 193 “Natural gas” of the
International Organization for Standardization (ISO) and has been taken over as EN ISO 6326-1:2009.
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 January 2010, and conflicting national standards shall be withdrawn at
the latest by January 2010.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech
Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and the United Kingdom.
Endorsement notice
The text of ISO 6326-1:2007 has been approved by CEN as EN ISO 6326-1:2009 without any modification.

INTERNATIONAL ISO
STANDARD 6326-1
Second edition
2007-06-15
Natural gas — Determination of sulfur
compounds —
Part 1:
General introduction
Gaz naturel — Détermination des composés soufrés —
Partie 1: Introduction générale

Reference number
ISO 6326-1:2007(E)
©
ISO 2007
ISO 6326-1:2007(E)
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ii © ISO 2007 – All rights reserved

ISO 6326-1:2007(E)
Contents Page
Foreword. iv
Introduction . v
1 Scope. 1
2 Normative references. 2
3 Sampling. 2
3.1 General. 2
3.2 Safety precautions. 3
4 Methods for determination of total sulfur content . 3
4.1 Wickbold combustion method (ISO 4260). 3
4.2 Lingener combustion method (ISO 6326-5) . 4
5 Methods for determination of individual sulfur compounds or groups of sulfur
compounds. 5
5.1 Gas chromatography method (ISO 19739). 5
5.2 Potentiometric method (ISO 6326-3). 5

ISO 6326-1:2007(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 6326-1 was prepared by Technical Committee ISO/TC 193, Natural gas, Subcommittee SC 1, Analysis of
natural gas.
This second edition cancels and replaces the first edition (ISO 6326-1:1989), which has been technically
revised due to the replacement of ISO 6326-2:1981 and ISO 6326-4:1994 by ISO 19739:2004, Natural gas –
Determination of sulfur compounds using gas chromatography, which gives the requirements needed to
perform a sulfur analysis by gas chromatography. This second edition also provides a general introduction to
ISO 19739.
ISO 6326 consists of the following parts, under the general title Natural gas — Determination of sulfur
compounds:
⎯ Part 1: General introduction
⎯ Part 3: Determination of hydrogen sulfide, mercaptan sulfur and carbonyl sulfide sulfur by potentiometry
⎯ Part 5: Lingener combustion method
iv © ISO 2007 – All rights reserved

ISO 6326-1:2007(E)
Introduction
Sulfur compounds can occur naturally in natural gas and remain as traces after treatment, or they may have
been injected deliberately to allow subsequent olfactory detection for safety reasons.
The standardization of several methods for the determination of sulfur compounds in natural gas is necessary
in view of the diversity of these compounds [hydrogen sulfide, carbonyl sulfide, tetrahydrothiophene (THT),
etc.] and the requirements of the determinations (required uncertainty, measurement at the well head, at
clean-up plant or in the transmission pipes, etc.).
In order to enable the user to choose the method most appropriate to his needs and to perform the
measurements under the best conditions, ISO 6326 has been prepared in several parts.
This part of ISO 6326 gives a rapid comparison of standardized methods and therefore provides information
for the choice of the method.
The other parts of ISO 6326 and ISO 19739 describe in detail the various standardized methods.
INTERNATIONAL STANDARD ISO 6326-1:2007(E)

Natural gas — Determination of sulfur compounds —
Part 1:
General introduction
WARNING — The majority of sulfur compounds are extremely toxic and thus present a serious health
hazard if handled without precautions.
1 Scope
This part of ISO 6326 gives a brief description of standardized methods that can be used for the determination
of sulfur compounds in natural gas.
The principle of each method is described generally, the range of concentrations for which the method is
suitable is indicated, and the analytical range and precision of each method is given. It should enable the user
to select judiciously the proper method for the application being considered. Sulfur analysis is performed in
order to determine
a) total sulfur,
b) sulfur contained in specific groups (e.g. thiol sulfur),
c) individual sulfur compounds, and
d) specific groups of sulfur compounds.
The standardized methods available in the field of sulfur analysis are
⎯ the Wickbold combustion method: for total sulfur determination (ISO 4260),
⎯ the Lingener combustion method: for total sulfur determination (ISO 6326-5),
⎯ gas chromatography: for determination of individual sulfur compounds (ISO 19739), and
⎯ potentiometry: for determination of hydrogen sulfide, carbonyl sulfide and thiol compounds (ISO 6326-3).
Other methods for the determination of sulfur compounds are available but are not considered here. Table 1
gives an overview of the standardized methods which can be used for the determination of total sulfur,
hydrogen sulfide, carbonyl sulfide, tetrahydrothiophene, thiol sulfur, individual thiols, individual thiophenes,
individual organic sulfides and disulfides.
ISO 6326-1:2007(E)
Table 1 — Methods for the determination of sulfur compounds in natural gas
a
Concentration range
Determination Method Reference
mg/m
Total sulfur Wickbold combustion method 1 to 20 000 ISO 4260
Lingener combustion method 0,5 to 1 000 ISO 6326-5
Hydrogen sulfide Potentiometry W 1 ISO 6326-3
(H S)
Gas chromatography 0,1 to 100 (or 0,5 to 600 ISO 19739
depending on the detector used)
Carbonyl sulfide Gas chromatography 0,1 to 30 ISO 19739
(COS)
Potentiometry W 1 ISO 6326-3
Tetrahydrothiophene Gas chromatography 0,1 to 100 ISO 19739
(THT)
Thiol sulfur Potentiometry W 1 ISO 6326-3
Individual thiols Gas chromatography 0,1 to 100 ISO 19739
Individual thiophenes Gas chromatography 0,1 to 100 ISO 19739
Individual organic Gas chromatography 0,1 to 100 ISO 19739
sulfides and disulfides
a
For the determination of total sulfur, the sulfur content is expressed as milligrams of sulfur per cubic metre of gas. For the
determination of sulfur compounds, the mass concentration of sulfur compounds is expressed as milligram
...