ASTM D3173-02
(Test Method)Standard Test Method for Moisture in the Analysis Sample of Coal and Coke
Standard Test Method for Moisture in the Analysis Sample of Coal and Coke
SCOPE
1.1 This test method covers the determination of moisture in the analysis sample of coal or coke. It is used for calculating other analytical results to a dry basis. When used in conjunction with the air drying loss as determined in accordance with Method D 2013 or Practice D 346, each analytical result can be calculated to an as-received basis:
1.2 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 and health practices and determine the applicability of regulatory limitations prior to use.
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Designation:D3173–02
Standard Test Method for
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Moisture in the Analysis Sample of Coal and Coke
This standard is issued under the fixed designation D3173; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (ϵ) indicates an editorial change since the last revision or reapproval.
1. Scope D3180D3180.Moisture,ash,volatilematter,andfixedcarbon
percents constitute the proximate analysis of coal and coke.
1.1 Thistestmethodcoversthedeterminationofmoisturein
the analysis sample of coal or coke. It is used for calculating
5. Analysis Sample
other analytical results to a dry basis. When used in conjunc-
5.1 The analysis sample is that sample which has been
tion with the air drying loss as determined in accordance with
pulverized to pass 250-µm (No. 60) sieve as prepared in
Method D2013D2013 or Practice D346D346, each analyti-
accordance with Practice D 346D 346 or Method
cal result can be calculated to an as-received basis:
D2013D2013.
1.2 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
6. Apparatus
responsibility of the user of this standard to establish appro-
6.1 Drying Oven, for coal samples:
priate safety and health practices and determine the applica-
6.1.1 Fordeterminingthemoistureofcoal,theovenshallbe
bility of regulatory limitations prior to use.
so constructed as to have a uniform temperature in all parts,
have a minimum of air space, and be capable of temperature
2. Referenced Documents
regulation between the limits of 104 and 110°C. It may be of
2.1 ASTM Standards:
theformshowninFig.1.Provisionshallbemadeforrenewing
D346 Practice for Collection and Preparation of Coke
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the preheated air in the oven at the rate of two to four times a
Samples for Laboratory Analysis
2 minute, with the air dried as defined in 7.1.
D2013 Method of Preparing Coal Samples for Analysis
6.1.2 In the oven shown in Fig. 1, the door should contain a
D3180 Practice for Calculating Coal and Coke Analyses
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2 hole of approximately ⁄8 in. (3.2 mm) in diameter near the
from As-Determined to Different Bases
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bottom to permit a free flow of air through the oven space.
D3302 Test Method for Total Moisture in Coal
6.2 Drying Oven, for coke samples. For determining the
3. Summary of Test Method moisture of coke, an ordinary drying oven with openings for
natural air circulation and capable of temperature regulation
3.1 Moisture is determined by establishing the loss in
between limits of 104 and 110°C may be used.
weight of the sample when heated under rigidly controlled
6.3 Capsules,withcovers.Aconvenientform,whichallows
conditions of temperature, time and atmosphere, sample
the ash determination to be made on the same sample, is a
weight, and equipment specifications.
7 3
porcelain capsule, ⁄8 in. (22 mm) in depth and 1 ⁄4 in. (44 mm)
4. Significance and Use in diameter, or a fused silica capsule of similar shape. These
capsules shall be used with a well-fitting flat aluminum cover,
4.1 Moisture as determined by this test method is used for
illustrated in Fig. 2. Platinum crucibles or glass capsules with
calculating other analytical results to a moisture free basis
ground-glasscapsmayalsobeused.Theyshouldbeasshallow
using procedures in Practice D3180D3180. Moisture percent
as possible, consistent with convenient handling.
determined by this test method may be used in conjunction
with the air-dry moisture loss determined in Method
7. Reagents
D2013D2013 and Test Method D3302D3302 to determine
7.1 Dry Air—Air used to purge the drying oven should be
total moisture in coal. Total moisture is used for calculating
dried to a moisture content of 1.9 mg/L or less. (Dew
other analytical results to “as received” basis using Practice
point−10°C or less.)Any desiccant or drying method capable
of achieving this degree of dryness is suitable.
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7.2 Desiccants—Materials suitable for use in the desiccator
This test method is under the jurisdiction of ASTM Committee D05 on Coal
and Coke and is the direct responsibility of Subcommittee D05.21 on Methods of
may be chosen from the following:
Analysis.
7.2.1 Anhydrous Calcium Sulfate (0.004 mg/L).
Current edition approved Oct. 10, 2002. Published January 2003. Originally
7.2.2 Silica Gel.
approved in 1973. Last previous edition approved 2002 as D3173–02.
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Annual Book of ASTM Standards, Vol 05.05. 7.2.3 Magnesium Perchlorate (0.0005 mg/L).
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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