Standard Test Method for
Total Chlorine in Coal by the Oxygen Bomb Combustion/Ion
Selective Electrode Method1

This standard is issued under the fixed designation D 4208; 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 (e) 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 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.

2. Referenced Documents

2.1 ASTM Standards:
D 1193 Specification for Reagent Water2
D 3173 Test Method for Moisture in the Analysis Sample of
Coal and Coke3
D 3180 Practice for Calculating Coal and Coke Analysis
from As-Determined to Different Bases3
E 144 Practice for Safe Use of Oxygen Combustion
Bombs4
E 691 Practice for Conducting an Interlaboratory Study to
Determine the Precision of a Test Method5

3. Summary of Test Method

3.1 Total chlorine is determined in this method by combusting a weighed sample in an oxygen bomb with dilute base
adsorbing the chlorine vapors. The bomb is rinsed into a beaker
with water and following the addition of an ionic strength
adjuster, the chloride is determined by ion-selective electrode.

4. Significance and Use

4.1 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

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