ISO 15238:2016

INTERNATIONAL ISO
STANDARD 15238
Second edition
2016-11-15
Solid mineral fuels — Determination
of total cadmium content of coal
Combustibles minéraux solides — Dosage du cadmium total dans
le charbon
Reference number
ISO 15238:2016(E)
©
ISO 2016

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ISO 15238:2016(E)

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ii © ISO 2016 – All rights reserved

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ISO 15238:2016(E)

Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 1
5 Reagents . 1
6 Apparatus . 2
7 Preparation of sample . 2
8 Procedure. 3
8.1 Ashing of coal sample . 3
8.2 Preparation of test solution . 3
8.3 Preparation of blank solution . 3
8.4 Graphite-furnace atomic absorption analysis . 3
8.4.1 Calibration . 3
8.4.2 Measurement of standards . 3
8.4.3 Measurement of test solution . 4
8.4.4 Measurement of blank solution . 4
9 Expression of results . 4
9.1 Ash content . 4
9.2 Cadmium content . 4
10 Precision . 5
10.1 Repeatability limit . 5
10.2 Reproducibility critical difference . 5
11 Test report . 5
© ISO 2016 – All rights reserved iii

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ISO 15238:2016(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
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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
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The committee responsible for this document is ISO/TC 27, Solid mineral fuels, Subcommittee SC 5,
Methods of analysis.
This second edition cancels and replaces the first edition (ISO 15238:2003), of which it constitutes a
minor revision. This document incorporates changes related to dated references and other minor items
following its systematic review.
iv © ISO 2016 – All rights reserved

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INTERNATIONAL STANDARD ISO 15238:2016(E)
Solid mineral fuels — Determination of total cadmium
content of coal
1 Scope
This document specifies a procedure for the determination of the total cadmium content of coal.
This procedure has not been validated with coals that spontaneously ignite. Prior to use with such
sample types, users should validate the method.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 1170, Coal and coke — Calculation of analyses to different bases
ISO 3696, Water for analytical laboratory use — Specification and test methods
ISO 5068-2, Brown coals and lignites — Determination of moisture content — Part 2: Indirect gravimetric
method for moisture in the analysis sample
ISO 5069-2, Brown coals and lignites — Principles of sampling — Part 2: Sample preparation for
determination of moisture content and for general analysis
ISO 13909-4, Hard coal and coke — Mechanical sam
...