ASTM D3467-99(2003)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation: D 3467 – 99 (Reapproved 2003)
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 D 5742 Test Method for the Determination of Butane Ac-
tivity of Activated Carbon
1.1 This test method covers the determination of the acti-
E 300 Practice for Sampling Industrial Chemicals
vation level of activated carbon. Carbon tetrachloride (CCl )
E 691 Practice for Conducting an Interlaboratory Study to
activity is defined herein as the ratio (in percent) of the weight
Determine the Precision of a Test Method
of CCl adsorbed by an activated carbon sample to the weight
of the sample, when the carbon is saturated with CCl under
3. Terminology
conditions listed in this test method.
3.1 Definitions—Terms relating to this test method are
1.2 This standard does not purport to address all of the
defined in Terminology D 2652.
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro-
4. Summary of Test Method
priate safety and health practices and determine the applica-
4.1 Activity is determined by flowing CCl -laden air
bility of regulatory limitations prior to use. Specific hazards
through a sample of carbon of known weight, under specified
statements are given in Section 7.
conditions, until there is no further increase in the weight of the
2. Referenced Documents sample, then determining the weight of the CCl adsorbed. The
3 apparatus required for the test consists essentially of means to
2.1 ASTM Standards:
control the supply air pressure, to remove oil and water in both
D 2652 Terminology Relating to Activated Carbon
liquid and vapor states from the supply air, to produce the
D 2854 Test Method for Apparent Density of Activated
specified concentration of CCl in the air flowed through the
Carbon
carbon sample, and to control the flow rate of the gas (air +
D 2867 Test Method for Moisture in Activated Carbon
CCl ) mixture through the sample.
5. Significance and Use
This test method is under the jurisdiction of ASTM Committee D28 on
Activated Carbon and is the direct responsibility of Subcommittee D28.04 on Gas 5.1 Activity as measured by this test method is basically a
Phase Evaluation Tests.
measure of the pore volume of the activated carbon sample.
Current edition approved October 1, 2003. Published November 2003. Originally
This test method is therefore a means of determining the degree
approved in 1976. Last previous edition approved in 1999 as D 3467 – 99.
of completion of the activation process, hence a useful means
The data for this correlation is available from ASTM International Headquar-
ters. Request RR: D 28–1000.
of quality control for gas-phase activated carbons. This activity
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
number does not necessarily provide an absolute or relative
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
measure of the effectiveness of the tested carbon on other
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. adsorbates, or at other conditions of operation.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
D 3467 – 99 (2003)
6. Apparatus and Materials rial Safety Data Sheet (MSDS) obtained from the supplier or
manufacturer of the carbon tetrachloride should be available as
6.1 Carbon Tetrachloride, reagent grade.
a guide, as well. Acceptable concentrations of carbon tetrachlo-
6.2 Supply of Clean, Dry, Oil-Free Air—The air must be
ride for stack release also should conform to the regulations of
passed through a HEPA filter and a bed of activated carbon
the United States Environmental Protection Agency, also
containing at least 500 mL of carbon per 1670 mL/min of air
available in the Federal Register.
flow. Relative humidity of the air must be less than 5 % at
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.
6.7 Regulating Valve, needle valve, flowmeter, and clock.
10. Procedure
6.8 Adsorption Tube having the critical dimensions shown
in Fig. 1. 10.1 Dry the sample using the procedure described in Test
6.9 Thermostat, capable of maintaining the CCl -laden air Method D 2867.
stream and sample tube at a temperature of 25 6 1°C. 10.2 Weigh the d
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