ISO/TS 12902:2001

SLOVENSKI STANDARD
SIST ISO/TS 12902:2002
01-junij-2002
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Solid mineral fuels -- Determination of total carbon, hydrogen and nitrogen --
Instrumental methods
Combustibles minéraux solides -- Dosage du carbone, de l'hydrogène et de l'azote total -
- Méthodes instrumentales
Ta slovenski standard je istoveten z: ISO/TS 12902:2001
ICS:
75.160.10 Trda goriva Solid fuels
SIST ISO/TS 12902:2002 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST ISO/TS 12902:2002

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SIST ISO/TS 12902:2002


TECHNICAL ISO/TS
SPECIFICATION 12902
First edition
2001-12-15

Solid mineral fuels — Determination of total
carbon, hydrogen and nitrogen —
Instrumental methods
Combustibles minéraux solides — Dosage du carbone, de l'hydrogène et
de l'azote total — Méthodes instrumentales




Reference number
ISO/TS 12902:2001(E)
©
ISO 2001

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SIST ISO/TS 12902:2002
ISO/TS 12902:2001(E)
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ii © ISO 2001 – All rights reserved

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SIST ISO/TS 12902:2002
ISO/TS 12902:2001(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
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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.
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.
In other circumstances, particularly when there is an urgent market requirement for such documents, a technical
committee may decide to publish other types of normative document:
— an ISO Publicly Available Specification (ISO/PAS) represents an agreement between technical experts in an
ISO working group and is accepted for publication if it is approved by more than 50 % of the members of the
parent committee casting a vote;
— an ISO Technical Specification (ISO/TS) represents an agreement between the members of a technical
committee and is accepted for publication if it is approved by 2/3 of the members of the committee casting a
vote.
An ISO/PAS or ISO/TS is reviewed after three years with a view to deciding whether it should be confirmed for a
further three years, revised to become an International Standard, or withdrawn. In the case of a confirmed ISO/PAS
or ISO/TS, it is reviewed again after six years at which time it has to be either transposed into an International
Standard or withdrawn.
Attention is drawn to the possibility that some of the elements of this Technical Specification may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO/TS 12902 was prepared by Technical Committee ISO/TC 27, Solid mineral fuels, Subcommittee SC 5,
Methods of analysis.
© ISO 2001 – All rights reserved iii

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SIST ISO/TS 12902:2002
ISO/TS 12902:2001(E)
Introduction
Instrumental methods for the analysis of carbon, hydrogen and nitrogen are now in widespread and regular use,
often in preference to formerly developed chemical methods for which International Standards exist. These
International Standards and/or Certified Reference Materials usually provide the data for the calibration of such
instrumental methods. It was considered that the procedures adopted in these instrumental methods should be
standardized as far as possible and at this stage would be best presented as a Technical Specification while further
data comparing instrumental and chemical methods is gathered and assessed.

iv © ISO 2001 – All rights reserved

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SIST ISO/TS 12902:2002
TECHNICAL SPECIFICATION ISO/TS 12902:2001(E)

Solid mineral fuels — Determination of total carbon, hydrogen and
nitrogen — Instrumental methods
1 Scope
This Technical Specification specifies the procedures to be followed when determining the mass fractions of total
carbon (including that present as carbonates), total hydrogen (including that present as water) and nitrogen in hard
coal, brown coal and lignite, and coke by instrumental methods.
2 Normative references
The following normative documents contain provisions which, through reference in this text, constitute provisions of
this Technical Specification. For dated references, subsequent amendments to, or revisions of, any of these
publications do not apply. However, parties to agreements based on this Technical Specification are encouraged to
investigate the possibility of applying the most recent editions of the normative documents 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 331:1983, Coal — Determination of moisture in the analysis sample — Direct gravimetric method
ISO 687:1974, Coke — Determination of moisture in the analysis sample
ISO 1015:1992, Brown coals and lignites — Determination of moisture content — Direct volumetric method
ISO 1170:1977, Coal and coke — Calculation of analyses to different bases
ISO 1988:1975, Hard coal — Sampling
ISO 2309:1980, Coke — Sampling
ISO 5068:1983, Brown coals and lignites — Determination of moisture content — Indirect gravimetric method
ISO 5069-2:1983, Brown coals and lignites — Principles of sampling — Part 2: Sample preparation for
determination of moisture content and for general analysis
ISO 13909-1:2001, Hard coal and coke — Mechanical sampling — Part 1: General introduction
ISO 13909-2:2001, Hard coal and coke — Mechanical sampling — Part 2: Coal — Sampling from moving streams
ISO 13909-3:2001, Hard coal and coke — Mechanical sampling — Part 3: Coal — Sampling from stationary lots
ISO 13909-4:2001, Hard coal and coke — Mechanical sampling — Part 4: Coal — Preparation of test samples
ISO 13909-5:2001, Hard coal and coke — Mechanical sampling — Part 5: Coke — Sampling from moving streams
ISO 13909-6:2001, Hard coal and coke — Mechanical sampling — Part 6: Coke — Preparation of test samples
ISO 13909-7:2001, Hard coal and coke — Mechanical sampling — Part 7: Methods for determining the precision of
sampling, sample preparation and testing
ISO 13909-8:2001, Hard coal and coke — Mechanical sampling — Part 8: Methods of testing for bias
© ISO 2001 – All rights reserved 1

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SIST ISO/TS 12902:2002
ISO/TS 12902:2001(E)
3 Principle
A known mass of the sample is burnt in oxygen, or in an oxygen/carrier gas mixture, under conditions such that it is
converted into ash and gaseous products of combustion, which consist mainly of carbon dioxide, water vapour,
elemental nitrogen and/or oxides of nitrogen, oxides and oxyacids of sulfur and hydrogen halides. The products of
combustion are treated to ensure that any hydrogen associated with sulfur or halide products of combustion is
liberated as water vapour, oxides of nitrogen are reduced to elemental nitrogen, and those products of combustion
which would interfere with the subsequent gas-analysis procedures are removed. The carbon dioxide, water vapour
and nitrogen mass fractions of the gas stream are then determined quantitatively by appropriate instrumental gas-
analysis procedures.
4 Reagents
WARNING — Care should be exercised when handling reagents, many of which are toxic and corrosive.
During the analysis, unless otherwise stated, use only reagents of recognized analytical grade and only distilled
water
...