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ASTM D4208-88(2002)

(Test Method)

Standard Test Method for Total Chlorine in Coal by the Oxygen Bomb Combustion/Ion Selective Electrode Method

Standard Test Method for Total Chlorine in Coal by the Oxygen Bomb Combustion/Ion Selective Electrode Method

SCOPE
1.1 This test method covers the analysis of total chlorine in coal.
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.

General Information

Status
Historical
Publication Date
29-Sep-1988
ICS
75.160.10 - Solid fuels
Technical Committee
D05 - Coal and Coke
Drafting Committee
D05.21 - Methods of Analysis
Current Stage
Ref Project

Relations

Replaces
ASTM D4208-88(1997) - Standard Test Method for Total Chlorine in Coal by the Oxygen Bomb Combustion/Ion Selective Electrode Method
Effective Date
30-Sep-1988

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ASTM D4208-88(2002) - Standard Test Method for Total Chlorine in Coal by the Oxygen Bomb Combustion/Ion Selective Electrode MethodASTM D4208-88(2002) - Standard Test Method for Total Chlorine in Coal by the Oxygen Bomb Combustion/Ion Selective Electrode Method
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ASTM D4208-88(2002) - Standard Test Method for Total Chlorine in Coal by the Oxygen Bomb Combustion/Ion Selective Electrode Method
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Please contact ASTM International (www.astm.org) for the latest information.
Designation: D 4208 – 88 (Reapproved 2002)
Standard Test Method for
Total Chlorine in Coal by the Oxygen Bomb Combustion/Ion
1
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 5. Apparatus
1.1 This test method covers the analysis of total chlorine in 5.1 Combustion Bomb, constructed of materials that are not
coal. affected by the combustion process or products. The bomb
1.2 This standard does not purport to address all of the must be designed so that all liquid combustion products can be
safety concerns, if any, associated with its use. It is the quantitatively recovered by washing the inner surfaces. There
responsibility of the user of this standard to establish appro- must be no gas leakage during the test. The bomb must be
priate safety and health practices and determine the applica- capableofwithstandingahydrostatic-pressuretestto3000psig
bility of regulatory limitations prior to use. (approximately20MPa)atroomtemperaturewithoutstressing
any part beyond its elastic limit.
2. Referenced Documents
5.2 Water Bath—A container large enough to hold the
2.1 ASTM Standards:
combustion bomb and enough cooling water to dissipate the
2
D1193 Specification for Reagent Water heat generated during the combustion process. The container
D3173 TestMethodforMoistureintheAnalysisSampleof
shall be designed to allow a constant flow of water around the
3
Coal and Coke combustion bomb.
D3180 Practice for Calculating Coal and Coke Analysis
5.3 Combustion Crucibles—Samples shall be burned in an
3
from As-Determined to Different Bases open crucible of platinum, quartz, or acceptable base-metal
E 144 Practice for Safe Use of Oxygen Combustion
alloy.
4
Bombs 5.4 Firing Wire, 100-mm, nickel-chromium alloy, No. 34B
&S gage, or platinum, No. 34 or No. 38B& S gage.
3. Summary of Test Method
5.5 Firing Circuit—A6to16-Valternatingordirectcurrent
3.1 Total chlorine is determined in this method by combus-
is required for ignition purposes with an ammeter or pilot light
ting a weighed sample in an oxygen bomb with dilute base
in the circuit to indicate when current is flowing.Astep-down
adsorbingthechlorinevapors.Thebombisrinsedintoabeaker
transformer connected to an alternating-current lighting circuit
with water and following the addition of an ionic strength
or batteries can be used. (Warning—The ignition circuit
adjuster, the chloride is determined by ion-selective electrode.
switch shall be of the momentary double-contact type, nor-
mally open, except when held closed by the operator. The
4. Significance and Use
switch should be depressed only long enough to fire the
4.1 The purpose of this test method is to measure the total
charge.)
chlorine content of coal. The chlorine content of coals may be
5.6 Balance, analytical, with a sensitivity of 0.1 mg.
useful in the evaluation of slagging problems, corrosion in
5.7 Specific-Ion Meter—A pH meter with an expandable
engineering processes, and in the total analysis of coal and
millivolt scale, specific-ion meter, sensitive to 0.1 mV, suitable
5
coke. When coal samples are combusted in accordance with
for method of standard addition determinations.
this method, the chlorine is quantitatively retained and is
5.8 Electrodes, chloride-sensing, with the appropriate
representative of the total chlorine content of the whole coal.
reference-typeelectrodeasrecommendedbythemanufacturer.
6. Reagents
1
This test method is under the jurisdiction of ASTM Committee D05 on Coal
6.1 Purity of Reagents—Reagent grade chemicals shall be
and Coke and is the direct responsibility of Subcommittee D05.21 on Methods of
Analysis. used in all tests. Unless otherwise indicated, it is intended that
Current edition approved Sept. 30, 1988. Published November 1988. Originally
published as D4208–82. Last previous edition D4208–88 (1997).
2
Annual Book of ASTM Standards, Vol 11.01.
3 5
Annual Book of ASTM Standards, Vol 05.06. Midgley, D., and Torrance, K., Potentiometric Water Analysis, John Wiley and
4
Annual Book of ASTM Standards, Vol 14.04. Sons, 1978.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1

---------------------- Page: 1 ----------------------
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Please contact ASTM International (www.astm.org) for the latest information.
D 4208 – 88 (2002)
all reagents shall conform to the specifications of the Commit- 8.3.1 The weight of coal sample and the pressu
...

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