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ASTM D6385-99(2011)

(Test Method)

Standard Test Method for Determining Acid Extractable Content in Activated Carbon by Ashing

Standard Test Method for Determining Acid Extractable Content in Activated Carbon by Ashing

SIGNIFICANCE AND USE
The quantitative determination of acid extractable content is useful in evaluating activated carbon samples that contain acid soluble impurities. These acid soluble impurities can affect applications of activated carbon.
Limitations of Method—Hydrochloric acid is used in this test method as the extracting acid. All elements or compounds present in the activated carbon sample, which can be acid extracted, are assumed to form water soluble chloride salts. Hydrochloric acid may not solubilize all impurities of activated carbon.
SCOPE
1.1 This test method is to be used for determination of the acid extractable content of a sample of activated carbon. This test method presupposes the existence of substances other than carbon to be present with activated carbon but does not purport to address or identify those substances which may be present. This test method should be applicable to any form in which activated carbon may exist and requires the performance of Test Method D2866.
1.2 This test method requires the use of concentrated hydrochloric acid, which should be used in an appropriate and safe manner, with eye protection, skin protection and handling carried out in a properly operating fume hood. The proper use of a muffle furnace is addressed in Test Method D2866.
1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.4 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 determines the applicability of regulatory limitations prior to use.

General Information

Status
Historical
Publication Date
28-Feb-2011
ICS
73.040 - Coals
Technical Committee
D28 - Activated Carbon
Drafting Committee
D28.02 - Liquid Phase Evaluation
Current Stage
Ref Project

Relations

Replaces
ASTM D6385-99(2006) - Standard Test Method for Determining Acid Extractable Content in Activated Carbon by Ashing
Effective Date
01-Mar-2011

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ASTM D6385-99(2011) - Standard Test Method for Determining Acid Extractable Content in Activated Carbon by AshingASTM D6385-99(2011) - Standard Test Method for Determining Acid Extractable Content in Activated Carbon by Ashing
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ASTM D6385-99(2011) - Standard Test Method for Determining Acid Extractable Content in Activated Carbon by Ashing
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: D6385 − 99 (Reapproved 2011)
Standard Test Method for
Determining Acid Extractable Content in Activated Carbon
by Ashing
This standard is issued under the fixed designation D6385; 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 percent mass of total ash of a sample and the percent mass of
total ash of a sample which has been acid extracted.
1.1 This test method is to be used for determination of the
acid extractable content of a sample of activated carbon. This
4. Significance and Use
test method presupposes the existence of substances other than
carbon to be present with activated carbon but does not purport
4.1 The quantitative determination of acid extractable con-
to address or identify those substances which may be present.
tent is useful in evaluating activated carbon samples that
This test method should be applicable to any form in which
contain acid soluble impurities. These acid soluble impurities
activated carbon may exist and requires the performance of
can affect applications of activated carbon.
Test Method D2866.
4.2 Limitations of Method—Hydrochloric acid is used in
1.2 This test method requires the use of concentrated
this test method as the extracting acid. All elements or
hydrochloric acid, which should be used in an appropriate and
compounds present in the activated carbon sample, which can
safe manner, with eye protection, skin protection and handling
be acid extracted, are assumed to form water soluble chloride
carried out in a properly operating fume hood. The proper use
salts. Hydrochloric acid may not solubilize all impurities of
of a muffle furnace is addressed in Test Method D2866.
activated carbon.
1.3 The values stated in SI units are to be regarded as
standard. No other units of measurement are included in this
5. Apparatus
standard.
5.1 250-mL Glass Beakers, for boiling and drying the
1.4 This standard does not purport to address all of the
sample.
safety concerns, if any, associated with its use. It is the
5.2 Watch Glass, suitable for 250-mL beaker.
responsibility of the user of this standard to establish appro-
priate safety and health practices and determines the applica-
5.3 Graduated Cylinders, of 100-mL(TD) and 25-mL(TD)
bility of regulatory limitations prior to use.
size.
2. Referenced Documents 5.4 BuchnerVacuumFunnel,7-cmIDorequivalentfiltering
device.
2.1 ASTM Standards:
D1193 Specification for Reagent Water
5.5 Vacuum Filter Flask, with side arm, 500 mL.
D2866 Test Method for Total Ash Content of Activated
5.6 Vacuum Filter Collar, for the above filter flask.
Carbon
D2867 Test Methods for Moisture in Activated Carbon 5.7 Filter Paper, which is hardened, ashless paper, ≤ 8
micron pore size and 7 cm in diameter is recommended, or a
E300 Practice for Sampling Industrial Chemicals
diameter which matches the vacuum funnel. The paper will be
3. Summary of Test Method
ashed with the carbon, so ashless paper is necessary.
3.1 The percent acid extractable content of an activated
5.8 Drying Oven, maintained at 150° C 6 5°C.
carbon sample is determined by the difference between the
5.9 Muffle Furnace, as specified in Test Method D2866.
This test method is under the jurisdiction ofASTM Committee D28 on Liquid
5.10 Porcelain Crucibles, as specified in Test Method
Phase Evaluation.
D2866.
Current edition approved March 1, 2011. Published May 2011. Originally
approved in 1999. Last previous edition approved in 2006 as D6385 – 99 (2006).
5.11 Desicator, containing indicating silica gel or any other
DOI: 10.1520/D6385-99R11.
desicant, which is effective in maintaining dryness of cooling
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
hot crucibles or oven dried carbon samples.
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. 5.12 Balance, capable of measurement of 0.1 mg.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
D6385 − 99 (2011)
5.13 CarbonParticleSizeReduction,amortarandpestle,or 8.7 After boiling, remove the beaker from heat and allow to
any other means of systematically reducing activated carbon cool.
particle size to pass through a No. 325 U.S. mesh screen. The
8.8 Vacuum filter the mixture through the 7-cm
...

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Standard Test Method for Determining Acid-Extractable Content in Activated Carbon by Ashing

SIGNIFICANCE AND USE
4.1 The quantitative determination of acid-extractable content is useful in evaluating activated carbon samples that contain acid-soluble impurities. These acid-soluble impurities can affect applications of activated carbon.  
4.2 Limitations of Method—Hydrochloric acid is used in this test method as the extracting acid. All elements or compounds present in the activated carbon sample, which can be acid extracted, are assumed to form water-soluble chloride salts. Hydrochloric acid may not solubilize all impurities of activated carbon.
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