ASTM D3467-99

NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
Designation: D 3467 – 99
AMERICAN SOCIETY FOR TESTING AND MATERIALS
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Reprinted from the Annual Book of ASTM Standards. Copyright ASTM
Standard Test Method for
Carbon Tetrachloride Activity of Activated Carbon
This standard is issued under the fixed designation D 3467; 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.
INTRODUCTION
Carbon tetrachloride has been identified as a potential contributor to stratospheric ozone depletion.
Amendments to the Montreal Protocol in 1990 mandate the global phase-out of carbon tetrachloride
production by the year 2000. The 1990 Amendments to the U.S. Clean Air Act were even more
aggressive, accelerating the U.S. phase-out deadline to the mid-1990’s. A small amount of carbon
tetrachloride will still be produced for critical industrial applications; however, in 1993 carbon
tetrachloride will not be available for laboratory purposes. With these developments, use of this test
method is not recommended.
Instead, the use of Test Method D 5742 is recommended. The correlation obtained between n-butane
activity values and carbon tetrachloride activity values is contained in that test method.
1. Scope Determine the Precision of a Test Method
1.1 This test method covers the determination of the acti-
3. Terminology
vation level of activated carbon. Carbon tetrachloride (CCl )
3.1 Definitions—Terms relating to this test method are
activity is defined herein as the ratio (in percent) of the weight
defined in Terminology D 2652.
of CCl adsorbed by an activated carbon sample to the weight
of the sample, when the carbon is saturated with CCl under
4. Summary of Test Method
conditions listed in this test method.
-laden air
4.1 Activity is determined by flowing CCl
1.2 This standard does not purport to address all of the
through a sample of carbon of known weight, under specified
safety concerns, if any, associated with its use. It is the
conditions, until there is no further increase in the weight of the
responsibility of the user of this standard to establish appro-
sample, then determining the weight of the CCl adsorbed. The
priate safety and health practices and determine the applica-
apparatus required for the test consists essentially of means to
bility of regulatory limitations prior to use. Specific hazards
control the supply air pressure, to remove oil and water in both
statements are given in Section 7.
liquid and vapor states from the supply air, to produce the
2. Referenced Documents specified concentration of CCl in the air flowed through the
carbon sample, and to control the flow rate of the gas (air +
2.1 ASTM Standards:
3 CCl ) mixture through the sample.
D 2652 Terminology Relating to Activated Carbon
D 2854 Test Method for Apparent Density of Activated
5. Significance and Use
Carbon
3 5.1 Activity as measured by this test method is basically a
D 2867 Test Method for Moisture in Activated Carbon
measure of the pore volume of the activated carbon sample.
D 5742 Test Method for the Determination of Butane Ac-
3 This test method is therefore a means of determining the degree
tivity of Activated Carbon
4 of completion of the activation process, hence a useful means
E 300 Practice for Sampling Industrial Chemicals
of quality control for gas-phase activated carbons. This activity
E 691 Practice for Conducting an Interlaboratory Study to
number does not necessarily provide an absolute or relative
measure of the effectiveness of the tested carbon on other
adsorbates, or at other conditions of operation.
This test method is under the jurisdiction of ASTM Committee D-28 on
Activated Carbon and is the direct responsibility of Subcommittee D28.04 on Gas
6. Apparatus and Materials
Phase Evaluation Tests.
6.1 Carbon Tetrachloride, reagent grade.
Current edition approved Feb. 10, 1999. Published May 1999. Originally
published as D 3467 – 76. Last previous edition D 3467 – 94. 6.2 Supply of Clean, Dry, Oil-Free Air—The air must be
The data for this correlation is available from ASTM Headquarters. Request
passed through a HEPA filter and a bed of activated carbon
RR: D 28–1000.
Annual Book of ASTM Standards, Vol 15.01.
4 5
Annual Book of ASTM Standards, Vol 15.05. Annual Book of ASTM Standards, Vol 14.02.
NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
D 3467
containing at least 500 mL of carbon per 1670 mL/min of air the United States Environmental Protection Agency, also
flow. Relative humidity of the air must be less than 5 % at available in the Federal Register.
25°C.
8. Sampling
6.3 Balance, capable of weighing to within 610 mg.
8.1 Guidance in sampling granular activated carbon is given
6.4 Pressure Regulator.
in Practice E 300.
6.5 CCl Gas-Generating Device, capable of maintaining a
CCl concentration of 250 6 10 mg/L in the air stream at a
9. Calibration
temperature of 25 6 1°C, equivalent to a relative saturation of
9.1 Calibration of thermometers, flowmeters, and balances
27.5 %. A typical generation device, shown in Fig. 1, consists
shall be maintained by standard laboratory methods. The
of a gas-washing bottle and a refrigerated bath capable of
concentration of CCl in the gas stream is determined as
maintaining a bath temperature of 0°C. See also Table 1.
described in 11.2.
6.6 Stopcock, three-way.
10. Procedure
6.7 Regulating Valve, needle valve, flowmeter, and clock.
6.8 Adsorption Tube having the critical dimensions shown 10.1 Dry the sample using the procedure described in Test
in Fig. 1.
Method D 2867.
6.9 Thermostat, capable of maintaining the CCl -laden air 10.2 Weigh the dry sample tube to nearest the 10 mg and
stream and sample tube at a temperature of 25 6 1°C.
record the weight.
10.3 Fill the sample tube to the 100-mm
...