ASTM D3682-21

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: D3682 − 21
Standard Test Method for
Major and Minor Elements in Combustion Residues from
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Coal Utilization Processes by Atomic Spectrometry
This standard is issued under the fixed designation D3682; 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 D3180 Practice for Calculating Coal and Coke Analyses
from As-Determined to Different Bases
1.1 This test method covers the analysis of the commonly
D5016 Test Method for Total Sulfur in Coal and Coke
determined major and minor elements in combustion residues
Combustion Residues Using a High-Temperature Tube
from coal utilization processes.
Furnace Combustion Method with Infrared Absorption
1.2 Use Test Method D5016 for determination of sulfur.
D7348 Test Methods for Loss on Ignition (LOI) of Solid
1.3 Units—The values stated in SI units are to be regarded Combustion Residues
D7582 Test Methods for Proximate Analysis of Coal and
as standard. The values given in parentheses are provided for
information only and are not considered standard. Coke by Macro Thermogravimetric Analysis
E691 Practice for Conducting an Interlaboratory Study to
1.4 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
responsibility of the user of this standard to establish appro-
3. Terminology
priate safety, health, and environmental practices and deter-
3.1 For definitions of terms used in this test method, refer to
mine the applicability of regulatory limitations prior to use.
Terminology D121.
1.5 This international standard was developed in accor-
dance with internationally recognized principles on standard-
4. Summary of Test Method
ization established in the Decision on Principles for the
4.1 The combustion residue to be analyzed is ignited in air
Development of International Standards, Guides and Recom-
at 750 °C to a constant mass. The ash is fused within lithium
mendations issued by the World Trade Organization Technical
tetraborate (Li B O ) followed by a final dissolution of the
Barriers to Trade (TBT) Committee. 2 4 7
melt in either dilute hydrochloric acid (HCl) or dilute nitric
acid(HNO ).Thesolutionisanalyzedbyatomicabsorptionfor
2. Referenced Documents
3
applicable elements.
2
2.1 ASTM Standards:
D121 Terminology of Coal and Coke
5. Significance and Use
D346 Practice for Collection and Preparation of Coke
5.1 A compositional analysis of the ash in coal is often
Samples for Laboratory Analysis
useful in the total description of the quality of the coal.
D1193 Specification for Reagent Water
Knowledge of ash composition is also useful in predicting the
D2013 Practice for Preparing Coal Samples for Analysis
behavior of ashes and slags in combustion chambers. Utiliza-
D3173 Test Method for Moisture in the Analysis Sample of
tion of the ash by-products of coal combustion sometimes
Coal and Coke
depends on the chemical composition of the ash.
D3174 Test Method for Ash in the Analysis Sample of Coal
5.2 Note that the chemical composition of laboratory-
and Coke from Coal
prepared coal ash may not exactly represent the composition of
mineralmatterinthecoalorthecompositionofflyashandslag
resulting from commercial-scale burning of the coal.
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This test method is under the jurisdiction of ASTM Committee D05 on Coal
and Coke and is the direct responsibility of Subcommittee D05.29 on Major
6. Apparatus
Elements in Ash and Trace Elements of Coal.
Current edition approved Dec. 1, 2021. Published January 2022. Originally
6.1 Ashing Furnace, with an adequate air circulation and
approved in 1978. Last previous edition approved in 2013 as D3682 – 13. DOI:
capable of having its temperature regulated at 500 °C and
10.1520/D3682-21.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or 750 °C.
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
6.2 Fusion Furnace, with an operating temperature of
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. 1000 °C.
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D3682 − 21
6.3 Platinum Vessels (Dish or Crucible), 35 mL to 85 mL 7.6 Lanthanum Chloride Solution (175 g⁄Llanthanum chlo-
capacity.Graphitecrucibleswith10 mLto15 mLcapacitymay ride (LaCl ) or equivalent 10
...