ASTM D4208-18
(Test Method)Standard Test Method for Total Chlorine in Coal by the Oxygen Vessel Combustion/Ion Selective Electrode Method
Standard Test Method for Total Chlorine in Coal by the Oxygen Vessel Combustion/Ion Selective Electrode Method
SIGNIFICANCE AND USE
5.1 The purpose of this test method is to measure the total chlorine content of coal. The chlorine content of coals may be useful in the evaluation of slagging problems, corrosion in engineering processes, and in the total analysis of coal and coke. When coal samples are combusted in accordance with this method, the chlorine is quantitatively retained and is representative of the total chlorine content of the whole coal.
SCOPE
1.1 This test method covers the analysis of total chlorine in coal.
1.2 Units—The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
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.
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Designation: D4208 − 18
Standard Test Method for
Total Chlorine in Coal by the Oxygen Vessel Combustion/
1
Ion Selective Electrode Method
This standard is issued under the fixed designation D4208; 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 (´) indicates an editorial change since the last revision or reapproval.
1. Scope* 4. Summary of Test Method
1.1 This test method covers the analysis of total chlorine in 4.1 Total chlorine is determined in this method by combus-
coal. ting a weighed sample in an oxygen combustion vessel with
dilute base adsorbing the chlorine vapors. The vessel is rinsed
1.2 Units—The values stated in SI units are to be regarded
into a beaker with water and following the addition of an ionic
asstandard.Nootherunitsofmeasurementareincludedinthis
strength adjuster, the chloride is determined by ion-selective
standard.
electrode.
1.3 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
5. Significance and Use
responsibility of the user of this standard to establish appro-
5.1 The purpose of this test method is to measure the total
priate safety, health, and environmental practices and deter-
chlorine content of coal. The chlorine content of coals may be
mine the applicability of regulatory limitations prior to use.
useful in the evaluation of slagging problems, corrosion in
1.4 This international standard was developed in accor-
engineering processes, and in the total analysis of coal and
dance with internationally recognized principles on standard-
coke. When coal samples are combusted in accordance with
ization established in the Decision on Principles for the
this method, the chlorine is quantitatively retained and is
Development of International Standards, Guides and Recom-
representative of the total chlorine content of the whole coal.
mendations issued by the World Trade Organization Technical
Barriers to Trade (TBT) Committee.
6. Apparatus
2. Referenced Documents 6.1 Combustion Vessel, constructed of materials that are not
2 affected by the combustion process or products. The vessel
2.1 ASTM Standards:
must be designed so that all liquid combustion products can be
D121Terminology of Coal and Coke
quantitatively recovered by washing the inner surfaces. There
D1193Specification for Reagent Water
must be no gas leakage during the test. The vessel must be
D3173Test Method for Moisture in theAnalysis Sample of
capable of withstanding a hydrostatic-pressure test to approxi-
Coal and Coke
mately 20MPa at room temperature without stressing any part
D3180Practice for Calculating Coal and Coke Analyses
beyond its elastic limit.
from As-Determined to Different Bases
E144Practice for Safe Use of Oxygen Combustion Vessels
6.2 Water Bath—A container large enough to hold the
E691Practice for Conducting an Interlaboratory Study to combustion vessel and enough cooling water to dissipate the
Determine the Precision of a Test Method heat generated during the combustion process. The container
shall be designed to allow a constant flow of water around the
3. Terminology
combustion vessel.
3.1 Fordefinitionsoftermsusedinthistestmethod,referto
6.3 Combustion Crucibles—Samples shall be burned in an
Terminology D121.
open crucible of platinum, quartz, or acceptable base-metal
alloy.
1
This test method is under the jurisdiction of ASTM Committee D05 on Coal
6.4 Firing Wire, 100mm, nickel-chromium alloy, No. 34
and Coke and is the direct responsibility of Subcommittee D05.21 on Methods of
Analysis.
B&S gauge, or platinum, No. 34 or No. 38 B&S gauge.
Current edition approved Dec. 15, 2018. Published February 2019. Originally
6.5 Firing Circuit—A 6V to 16V alternating or direct
approved in 1982. Last previous edition approved in 2013 as D4208–13. DOI:
10.1520/D4208-18.
current is required for ignition purposes with an ammeter or
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
pilot light in the circuit to indicate when current is flowing.A
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
step-down transformer connected to an alternating-current
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. lighting circuit or batteries can be used. (Warning—The
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
D4208 − 18
ignition circuit switch shall be of the momentary double- 9. Procedure for Vessel Combustion
contact type, normally open, excep
...
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: D4208 − 13 D4208 − 18
Standard Test Method for
Total Chlorine in Coal by the Oxygen BombVessel
1
Combustion/Ion Selective Electrode Method
This standard is issued under the fixed designation D4208; 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*
1.1 This test method covers the analysis of total chlorine in coal.
1.2 Units—The values stated in SI units are to be regarded as standard. No other units of measurement are included in this
standard.
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 safety, health, and healthenvironmental 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.
2. Referenced Documents
2
2.1 ASTM Standards:
D121 Terminology of Coal and Coke
D1193 Specification for Reagent Water
D3173 Test Method for Moisture in the Analysis Sample of Coal and Coke
D3180 Practice for Calculating Coal and Coke Analyses from As-Determined to Different Bases
E144 Practice for Safe Use of Oxygen Combustion Vessels
E691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
3. Terminology
3.1 For definitions of terms used in this test method, refer to Terminology D121.
4. Summary of Test Method
4.1 Total chlorine is determined in this method by combusting a weighed sample in an oxygen bomb combustion vessel with
dilute base adsorbing the chlorine vapors. The bombvessel is rinsed into a beaker with water and following the addition of an ionic
strength adjuster, the chloride is determined by ion-selective electrode.
5. Significance and Use
5.1 The purpose of this test method is to measure the total chlorine content of coal. The chlorine content of coals may be useful
in the evaluation of slagging problems, corrosion in engineering processes, and in the total analysis of coal and coke. When coal
samples are combusted in accordance with this method, the chlorine is quantitatively retained and is representative of the total
chlorine content of the whole coal.
6. Apparatus
6.1 Combustion Bomb,Vessel, constructed of materials that are not affected by the combustion process or products. The
bombvessel must be designed so that all liquid combustion products can be quantitatively recovered by washing the inner surfaces.
1
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 Analysis.
Current edition approved Jan. 1, 2013Dec. 15, 2018. Published January 2013February 2019. Originally approved in 1982. Last previous edition approved in 20072013
as D4208 – 02D4208 – 13.(2007). DOI: 10.1520/D4208-13.10.1520/D4208-18.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
D4208 − 18
There must be no gas leakage during the test. The bombvessel must be capable of withstanding a hydrostatic-pressure test to
approximately 20 MPa 20 MPa at room temperature without stressing any part beyond its elastic limit.
6.2 Water Bath—A container large enough to hold the combustion bombvessel and enough cooling water to dissipate the heat
generated during the combustion process. The container shall be designed to allow a constant flow of water around the combustion
bomb.vessel.
6.3 Combustion Crucibles—Samples shall be burned in an open crucible of platinum, quartz, or acceptable base-metal alloy.
6.4 Firing Wire, 100-mm,100 mm, nickel-chromium alloy, No. 34B & S gage, 34 B & S gauge, or platinum
...
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