ASTM D6385-99(2006)

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 D 2866.
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 D 2866.
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: 30-Sep-2006
• ICS: 73.040 - Coals
• Technical Committee: D28 - Activated Carbon
• Drafting Committee: D28.02 - Liquid Phase Evaluation

Relations

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

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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 2006)
Standard Test Method for
Determining Acid Extractable Content in Activated Carbon
1
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 3. Summary of Test Method
1.1 This test method is to be used for determination of the 3.1 The percent acid extractable content of an activated
acid extractable content of a sample of activated carbon. This carbon sample is determined by the difference between the
test method presupposes the existence of substances other than percent mass of total ash of a sample and the percent mass of
carbon to be present with activated carbon but does not purport total ash of a sample which has been acid extracted.
to address or identify those substances which may be present.
4. Significance and Use
This test method should be applicable to any form in which
activated carbon may exist and requires the performance of 4.1 The quantitative determination of acid extractable con-
tent is useful in evaluating activated carbon samples that
Test Method D2866.
1.2 This test method requires the use of concentrated contain acid soluble impurities. These acid soluble impurities
can affect applications of activated carbon.
hydrochloric acid, which should be used in an appropriate and
safe manner, with eye protection, skin protection and handling 4.2 Limitations of Method—Hydrochloric acid is used in
this test method as the extracting acid. All elements or
carried out in a properly operating fume hood. The proper use
of a muffle furnace is addressed in Test Method D2866. compounds present in the activated carbon sample, which can
be acid extracted, are assumed to form water soluble chloride
1.3 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the salts. Hydrochloric acid may not solubilize all impurities of
activated carbon.
responsibility of the user of this standard to establish appro-
priate safety and health practices and determines the applica-
5. Apparatus
bility of regulatory limitations prior to use.
5.1 250-mL Glass Beakers, for boiling and drying the
2. Referenced Documents
sample.
2
2.1 ASTM Standards: 5.2 Watch Glass, suitable for 250-mL beaker.
5.3 Graduated Cylinders, of 100-mL(TD) and 25-mL(TD)
D1193 Specification for Reagent Water
D2866 Test Method for Total Ash Content of Activated size.
5.4 BuchnerVacuumFunnel,7-cmIDorequivalentfiltering
Carbon
D2867 Test Methods for Moisture in Activated Carbon device.
5.5 Vacuum Filter Flask, with side arm, 500 mL.
E300 Practice for Sampling Industrial Chemicals
5.6 Vacuum Filter Collar, for the above filter flask.
5.7 Filter Paper, which is hardened, ashless paper, # 8
1
This test method is under the jurisdiction ofASTM Committee D28 on Liquid
micron pore size and 7 cm in diameter is recommended, or a
Phase Evaluation.
diameter which matches the vacuum funnel. The paper will be
Current edition approved Oct. 1, 2006. Published November 2006. Originally
ashed with the carbon, so ashless paper is necessary.
approved in 1999. Last previous edition approved in 1999 as D6385 – 99. DOI:
10.1520/D6385-99R06.
5.8 Drying Oven, maintained at 150° C 6 5°C.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
5.9 Muffle Furnace, as specified in Test Method D2866.
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
5.10 Porcelain Crucibles, as specified in Test Method
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. D2866.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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D6385–99 (2006)
5.11 Desicator, containing indicating silica gel or any other 8.6 Place the beaker and contents on a hot plate and bring to
desicant, which is effective in maintaining dryness of cooling a boil, maintaining boiling for at least 5 min. A watch glass
hot crucibles or oven dried carbon samples. should be used to cover the beaker while boiling the carbon-
acid-water mixture.
5.12 Balance, capable of measurement of 0.1 mg.
8.7 After boiling, remove the beaker from heat and allow to
5.13 CarbonParticleSizeReduction,amortarandpestle,or
cool.
any other means of systematically reducing activated carbon
8.8 Vacuum filter the mixture through the 7-cm filter funnel
particle size to pass through a No. 325 U.S. mesh screen. The
with hardened filter paper in place. Wash the carbon retained
size reduction device
...