ASTM D6357-21b

Standard Test Methods for Determination of Trace Elements in Coal, Coke, and Combustion Residues from Coal Utilization Processes by Inductively Coupled Plasma Atomic Emission Spectrometry, Inductively Coupled Plasma Mass Spectrometry, and Graphite Furnace Atomic Absorption Spectrometry

SIGNIFICANCE AND USE
5.1 Coal contains several elements whose individual mass fractions are generally less than 0.01 %. These elements are commonly and collectively referred to as trace elements. These elements primarily occur as part of the mineral matter in coal. The potential release of certain trace elements from coal combustion sources has become an environmental concern.  
5.2 The ash prepared in accordance with these provisional test methods quantitatively retains the elements listed in 1.1 and is representative of their mass fractions in the coal or coke.
SCOPE
1.1 These test methods pertain to the determination of antimony, arsenic, beryllium, cadmium, chromium, cobalt, copper, lead, manganese, molybdenum, nickel, vanadium, and zinc in coal and coke. These test methods can also be used for the analysis of residues from coal combustion processes. Additionally, there are specific test methods outlined that pertain to the determination of rare earth elements in coal and coal combustion residues.
Note 1: These test methods may be applicable to the determination of other trace elements.
Note 2: Rare earth elements are understood to include: cerium, dysprosium, erbium, europium, gadolinium, holmium, lanthanum, lutetium, neodymium, praseodymium, samarium, scandium, terbium, thulium, ytterbium, and yttrium.  
1.2 Units—The values stated in SI units are to be regarded as standard. The values given in parentheses after SI units are provided for information only and are not considered standard.  
1.2.1 All percentages are percent mass fractions unless otherwise noted.  
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

General Information

• Status: Published
• Publication Date: 30-Nov-2021
• ICS: 75.160.10 - Solid fuels
• Technical Committee: D05 - Coal and Coke
• Drafting Committee: D05.29 - Major Elements in Ash and Trace Elements of Coal

Standards Content (Sample)

This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: D6357 − 21b
Standard Test Methods for
Determination of Trace Elements in Coal, Coke, and
Combustion Residues from Coal Utilization Processes by
Inductively Coupled Plasma Atomic Emission Spectrometry,
Inductively Coupled Plasma Mass Spectrometry, and
1
Graphite Furnace Atomic Absorption Spectrometry
This standard is issued under the fixed designation D6357; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope 2. Referenced Documents
2
2.1 ASTM Standards:
1.1 These test methods pertain to the determination of
D121 Terminology of Coal and Coke
antimony, arsenic, beryllium, cadmium, chromium, cobalt,
D346 Practice for Collection and Preparation of Coke
copper, lead, manganese, molybdenum, nickel, vanadium, and
Samples for Laboratory Analysis
zinc in coal and coke. These test methods can also be used for
D1193 Specification for Reagent Water
the analysis of residues from coal combustion processes.
D2013 Practice for Preparing Coal Samples for Analysis
Additionally, there are specific test methods outlined that
D3173 Test Method for Moisture in the Analysis Sample of
pertain to the determination of rare earth elements in coal and
Coal and Coke
coal combustion residues.
D3174 Test Method forAsh in theAnalysis Sample of Coal
NOTE 1—These test methods may be applicable to the determination of
and Coke from Coal
other trace elements.
D3180 Practice for Calculating Coal and Coke Analyses
NOTE 2—Rare earth elements are understood to include: cerium,
dysprosium, erbium, europium, gadolinium, holmium, lanthanum, from As-Determined to Different Bases
lutetium, neodymium, praseodymium, samarium, scandium, terbium,
D7448 Practice for Establishing the Competence of Labora-
thulium, ytterbium, and yttrium.
tories Using ASTM Procedures in the Sampling and
1.2 Units—The values stated in SI units are to be regarded
Analysis of Coal and Coke
as standard. The values given in parentheses after SI units are
D7582 Test Methods for Proximate Analysis of Coal and
provided for information only and are not considered standard.
Coke by Macro Thermogravimetric Analysis
1.2.1 All percentages are percent mass fractions unless
D8146 Guide for Evaluating Test Method Capability and
otherwise noted.
Fitness for Use
E691 Practice for Conducting an Interlaboratory Study to
1.3 This standard does not purport to address all of the
Determine the Precision of a Test Method
safety concerns, if any, associated with its use. It is the
3
2.2 Other Documents:
responsibility of the user of this standard to establish appro-
EPA/600/4-91/010 MethodsfortheDeterminationofMetals
priate safety, health, and environmental practices and deter-
in Environmental Samples
mine the applicability of regulatory limitations prior to use.
1.4 This international standard was developed in accor-
3. Terminology
dance with internationally recognized principles on standard-
3.1 Definitions—Definitions applicable to these test meth-
ization established in the Decision on Principles for the
ods are listed in Terminology D121.
Development of International Standards, Guides and Recom-
mendations issued by the World Trade Organization Technical
4. Summary of Test Method
Barriers to Trade (TBT) Committee.
4.1 The coal or coke to be analyzed is ashed under con-
trolled conditions, digested by a mixture of aqua-regia and
1 2
ThesetestmethodsareunderthejurisdictionofASTMCommitteeD05onCoal For referenced ASTM standards, visit the ASTM website, www.astm.org, or
and Coke and are the direct responsibility of Subcommittee D05.29 on Major contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
Elements in Ash and Trace Elements of Coal. Standards volume information, refer to the standard’s Document Summary page on
Current edition approved Dec. 1, 2021. Published December 2021. Originally the ASTM website.
3
approved in 1996. Last previous edition approved in 2021 as D6357 – 21a. DOI: Available from Superintendent of Documents, U.S. Printing Office,
10.1520/D6357-21B. Washington, DC 20402.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

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D6357 − 21b
hydrofluoric acid, and finally dissolved in 1 % nitric acid. An 6.3.5 Autosampler—Although not specifically required, the
alternative dissolution procedure is provided which is a high- use of an autosampler is highly recommended.
tem
...

This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: D6357 − 21a D6357 − 21b
Standard Test Methods for
Determination of Trace Elements in Coal, Coke, and
Combustion Residues from Coal Utilization Processes by
Inductively Coupled Plasma Atomic Emission Spectrometry,
Inductively Coupled Plasma Mass Spectrometry, and
1
Graphite Furnace Atomic Absorption Spectrometry
This standard is issued under the fixed designation D6357; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
NOTE—The Repeatability and Reproducibility Limits in Table 3, Table 7, and Table X1.1 were corrected editorially and the year date
changed on June 11, 2021.
1. Scope
1.1 These test methods pertain to the determination of antimony, arsenic, beryllium, cadmium, chromium, cobalt, copper, lead,
manganese, molybdenum, nickel, vanadium, and zinc in coal and coke. These test methods can also be used for the analysis of
residues from coal combustion processes. Additionally, there are specific test methods outlined that pertain to the determination
of rare earth elements in coal and coal combustion residues.
NOTE 1—These test methods may be applicable to the determination of other trace elements.
NOTE 2—Rare earth elements are understood to include: cerium, dysprosium, erbium, europium, gadolinium, holmium, lanthanum, lutetium, neodymium,
praseodymium, samarium, scandium, terbium, thulium, ytterbium, and yttrium.
1.2 Units—The values stated in SI units are to be regarded as standard. The values given in parentheses after SI units are provided
for information only and are not considered standard.
1.2.1 All percentages are percent mass fractions unless otherwise noted.
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility
of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of
regulatory limitations prior to use.
1.4 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
1
These test methods are under the jurisdiction of ASTM Committee D05 on Coal and Coke and are the direct responsibility of Subcommittee D05.29 on Major Elements
in Ash and Trace Elements of Coal.
Current edition approved June 11, 2021Dec. 1, 2021. Published July 2021December 2021. Originally approved in 1996. Last previous edition approved in 2021 as
D6357 – 21.D6357 – 21a. DOI: 10.1520/D6357-21A.10.1520/D6357-21B.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
D6357 − 21b
2. Referenced Documents
2
2.1 ASTM Standards:
D121 Terminology of Coal and Coke
D346 Practice for Collection and Preparation of Coke Samples for Laboratory Analysis
D1193 Specification for Reagent Water
D2013 Practice for Preparing Coal Samples for Analysis
D3173 Test Method for Moisture in the Analysis Sample of Coal and Coke
D3174 Test Method for Ash in the Analysis Sample of Coal and Coke from Coal
D3180 Practice for Calculating Coal and Coke Analyses from As-Determined to Different Bases
D7448 Practice for Establishing the Competence of Laboratories Using ASTM Procedures in the Sampling and Analysis of Coal
and Coke
D7582 Test Methods for Proximate Analysis of Coal and Coke by Macro Thermogravimetric Analysis
D8146 Guide for Evaluating Test Method Capability and Fitness for Use
E691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
3
2.2 Other Documents:
EPA/600/4-91/010 Methods for the Determination of Metals in Environmental Samples
3. Terminology
3.1 Definitions—Definitions applicable to these test methods are listed in Terminology D121.
4. Summary of Test Method
4.1 The coal or coke to be analyzed is ashed under controlled conditions, digested by a mixture of aqua-regia and hydrofluoric
acid, and finally dissolved in 1 % nitric acid. An alternative dissolution procedure is provided which is a high- temperature fusion
method using a borate fluxing agent to specifically digest samples for rare ear
...