ASTM D3682-13

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Designation: D3682 − 13
Standard Test Method for
Major and Minor Elements in Combustion Residues from
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Coal Utilization Processes
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 D7582 Test Methods for Proximate Analysis of Coal and
Coke by Macro Thermogravimetric Analysis
1.1 This test method covers the analysis of the commonly
E691 Practice for Conducting an Interlaboratory Study to
determined major and minor elements in combustion residues
Determine the Precision of a Test Method
from coal utilization processes.
3. Terminology
NOTE 1—Test Method D5016 shall be used for determination of sulfur.
1.2 The values stated in SI units are to be regarded as 3.1 For definitions of terms used in this test method, refer to
standard. No other units of measurement are included in this Terminology D121.
standard.
4. Summary of Test Method
1.3 This standard does not purport to address all of the
4.1 The combustion residue to be analyzed is ignited in air
safety concerns, if any, associated with its use. It is the
at 750°C to a constant weight. The ash is fused within lithium
responsibility of the user of this standard to establish appro-
tetraborate (Li B O ) followed by a final dissolution of the
priate safety and health practices and determine the applica- 2 4 7
melt in either dilute hydrochloric acid (HCl) or dilute nitric
bility of regulatory limitations prior to use.
acid (HNO ). The solution is analyzed by atomic absorption/
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2. Referenced Documents emission for applicable elements.
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2.1 ASTM Standards:
5. Significance and Use
D121 Terminology of Coal and Coke
5.1 A compositional analysis of the ash in coal is often
D346 Practice for Collection and Preparation of Coke
useful in the total description of the quality of the coal.
Samples for Laboratory Analysis
Knowledge of ash composition is also useful in predicting the
D1193 Specification for Reagent Water
behavior of ashes and slags in combustion chambers. Utiliza-
D2013 Practice for Preparing Coal Samples for Analysis
tion of the ash by-products of coal combustion sometimes
D3173 Test Method for Moisture in the Analysis Sample of
depends on the chemical composition of the ash.
Coal and Coke
D3174 Test Method forAsh in theAnalysis 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
D3180 Practice for Calculating Coal and Coke Analyses
mineralmatterinthecoalorthecompositionofflyashandslag
from As-Determined to Different Bases
resulting from commercial-scale burning of the coal.
D5016 Test Method for Total Sulfur in Coal and Coke
6. Apparatus
Combustion Residues Using a High-Temperature Tube
Furnace Combustion Method with Infrared Absorption
6.1 Ashing Furnace, with an adequate air circulation and
D7348 Test Methods for Loss on Ignition (LOI) of Solid
capable of having its temperature regulated at 500°C and
Combustion Residues
750°C.
6.2 Fusion Furnace, with an operating temperature of
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This test method is under the jurisdiction of ASTM Committee D05 on Coal 1000°C.
and Coke and is the direct responsibility of Subcommittee D05.29 on Major
6.3 Platinum Dish, 35- to 85 mL capacity.
Elements in Ash and Trace Elements of Coal.
Current edition approved Oct. 15, 2013. Published November 2013. Originally
6.4 Stirring Hotplate and Bars, operating temperature of
approved in 1978. Last previous edition approved in 2006 as D3682 – 01(2006).
200°C.
DOI: 10.1520/D3682-13.
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For referenced ASTM standards, visit the ASTM website, www.astm.org, or
6.5 Atomic Absorption Spectrometer—Any dual-channel in-
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
strument using a deuterium (D ) arc background corrector or
Standards volume information, refer to the standard’s Document Summary page on 2
the ASTM website. other comparable simultaneous background correction system.
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D3682 − 13
7. Reagents 8.2 Laboratory Ashing of Coal and Coke Analysis Sample—
Prepare the ash from a thoroughly mixed analysis sample of
7.1 Purity of Reagents—Reagent grade chemicals shall be
coal or coke (8.1). Spread the coal and coke in a layer not over
used in all tests. It is intended that all reagents shall conform to
6 mm in depth in a porcelain, quartz, or fused silica roasting
the specifications of the Committee on Analytical Reagents of
dis
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