ASTM D4607-14

Standard Test Method for Determination of Iodine Number of Activated Carbon

SIGNIFICANCE AND USE
4.1 The iodine number is a relative indicator of porosity in an activated carbon. It does not necessarily provide a measure of the carbon's ability to absorb other species. Iodine number may be used as an approximation of surface area for some types of activated carbons (see Test Method C819). However, it must be realized that any relationship between surface area and iodine number cannot be generalized. It varies with changes in carbon raw material, processing conditions, and pore volume distribution (see Definitions D2652).  
4.2 The presence of adsorbed volatiles, sulfur; and water extractables may affect the measured iodine number of an activated carbon.
SCOPE
1.1 This test method covers the determination of the relative activation level of unused or reactivated carbons by adsorption of iodine from aqueous solution. The amount of iodine absorbed (in milligrams) by 1 g of carbon using test conditions listed herein is called the iodine number.  
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.  
1.3 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. Specific hazard statements are given in Section 7.

General Information

• Status: Historical
• Publication Date: 28-Feb-2014
• ICS: 75.160.10 - Solid fuels
• Technical Committee: D28 - Activated Carbon
• Drafting Committee: D28.02 - Liquid Phase Evaluation

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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: D4607 − 14
Standard Test Method for
1
Determination of Iodine Number of Activated Carbon
This standard is issued under the fixed designation D4607; 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 2.2 NIST Publication:
4
Circular 602—Testing of Glass Volumetric Apparatus
1.1 Thistestmethodcoversthedeterminationoftherelative
activation level of unused or reactivated carbons by adsorption
3. Summary of Test Method
of iodine from aqueous solution. The amount of iodine
absorbed (in milligrams) by1gof carbon using test conditions
3.1 This test method is based upon a three-point adsorption
listed herein is called the iodine number.
isotherm (see Practices D3860). A standard iodine solution is
treated with three different weights of activated carbon under
1.2 The values stated in SI units are to be regarded as
specifiedconditions.Thecarbontreatedsolutionsarefilteredto
standard. No other units of measurement are included in this
separate the carbon from the treated iodine solution (filtrate).
standard.
Iodine remaining in the filtrate is measured by titration. The
1.3 This standard does not purport to address all of the
amount of iodine removed per gram of carbon is determined
safety concerns, if any, associated with its use. It is the
for each carbon dosage and the resulting data used to plot an
responsibility of the user of this standard to establish appro-
adsorption isotherm. The amount of iodine adsorbed (in
priate safety and health practices and determine the applica-
milligrams) per gram of carbon at a residual iodine concentra-
bility of regulatory limitations prior to use. Specific hazard
tion of 0.02 N is reported as the iodine number.
statements are given in Section 7.
3.2 Iodine concentration in the standard solution affects the
2. Referenced Documents
capacity of an activated carbon for iodine adsorption.
2
Therefore, the normality of the standard iodine solution must
2.1 ASTM Standards:
be maintained at a constant value (0.100 6 0.001 N ) for all
C819 Test Method for Specific Surface Area of Carbon or
3
iodine number measurements.
Graphite (Withdrawn 1987)
D1193 Specification for Reagent Water
3.3 The apparatus required consists of various laboratory
D2652 Terminology Relating to Activated Carbon
glasswareusedtopreparesolutionsandcontactcarbonwiththe
D2867 Test Methods for Moisture in Activated Carbon
standard iodine solution. Filtration and titration equipment are
D3860 Practice for Determination ofAdsorptive Capacity of
also required.
Activated Carbon by Aqueous Phase Isotherm Technique
E11 Specification for Woven Wire Test Sieve Cloth and Test
4. Significance and Use
Sieves
4.1 The iodine number is a relative indicator of porosity in
E177 Practice for Use of the Terms Precision and Bias in
an activated carbon. It does not necessarily provide a measure
ASTM Test Methods
of the carbon’s ability to absorb other species. Iodine number
E287 Specification for Laboratory Glass Graduated Burets
may be used as an approximation of surface area for some
E288 Specification for Laboratory Glass Volumetric Flasks
types of activated carbons (see Test Method C819). However,
E300 Practice for Sampling Industrial Chemicals
it must be realized that any relationship between surface area
and iodine number cannot be generalized. It varies with
1
This test method is under the jurisdiction of ASTM Committee D28 on
changes in carbon raw material, processing conditions, and
ActivatedCarbonandisthedirectresponsibilityofSubcommitteeD28.02onLiquid
pore volume distribution (see Definitions D2652).
Phase Evaluation.
Current edition approved March 1, 2014. Published May 2014. Originally
4.2 The presence of adsorbed volatiles, sulfur; and water
approved in 1986. Last previous edition approved in 2006 as D4607 – 94 (Reap-
extractables may affect the measured iodine number of an
proved 2011). DOI: 10.1520/D4607-14.
activated carbon.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.
3 4
The last approved version of this historical standard is referenced on Available from National Institute of Standards and Technology (NIST), 100
www.astm.org. Bureau Dr., Stop 1070, Gaithersburg, MD 20899-1070, http://www.nist.gov.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

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D4607 − 14
5. Apparatus ate health an
...

This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: D4607 − 94 (Reapproved 2011) D4607 − 14
Standard Test Method for
1
Determination of Iodine Number of Activated Carbon
This standard is issued under the fixed designation D4607; 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
1.1 This test method covers the determination of the relative activation level of unused or reactivated carbons by adsorption of
iodine from aqueous solution. The amount of iodine absorbed (in milligrams) by 1 g of carbon using test conditions listed herein
is called the iodine number.
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.3 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. Specific hazard statements are given in Section 7.
2. Referenced Documents
2
2.1 ASTM Standards:
3
C819 Test Method for Specific Surface Area of Carbon or Graphite (Withdrawn 1987)
D1193 Specification for Reagent Water
D2652 Terminology Relating to Activated Carbon
D2867 Test Methods for Moisture in Activated Carbon
D3860 Practice for Determination of Adsorptive Capacity of Activated Carbon by Aqueous Phase Isotherm Technique
E11 Specification for Woven Wire Test Sieve Cloth and Test Sieves
E177 Practice for Use of the Terms Precision and Bias in ASTM Test Methods
E287 Specification for Laboratory Glass Graduated Burets
E288 Specification for Laboratory Glass Volumetric Flasks
E300 Practice for Sampling Industrial Chemicals
2.2 NIST Publication:
4
Circular 602—Testing of Glass Volumetric Apparatus
3. Summary of Test Method
3.1 This test method is based upon a three-point adsorption isotherm (see Practices D3860). A standard iodine solution is treated
with three different weights of activated carbon under specified conditions. The carbon treated solutions are filtered to separate the
carbon from the treated iodine solution (filtrate). Iodine remaining in the filtrate is measured by titration. The amount of iodine
removed per gram of carbon is determined for each carbon dosage and the resulting data used to plot an adsorption isotherm. The
amount of iodine adsorbed (in milligrams) per gram of carbon at a residual iodine concentration of 0.02 N is reported as the iodine
number.
3.2 Iodine concentration in the standard solution affects the capacity of an activated carbon for iodine adsorption. Therefore,
the normality of the standard iodine solution must be maintained at a constant value (0.100 6 0.001 N ) for all iodine number
measurements.
1
This test method is under the jurisdiction of ASTM Committee D28 on Activated Carbon and is the direct responsibility of Subcommittee D28.02 on Liquid Phase
Evaluation.
Current edition approved March 1, 2011March 1, 2014. Published May 2011May 2014. Originally approved in 1986. Last previous edition approved in 2006 as D4607 – 94
(2006). (Reapproved 2011). DOI: 10.1520/D4607-94R11.10.1520/D4607-14.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
3
The last approved version of this historical standard is referenced on www.astm.org.
4
Available from National Institute of Standards and Technology (NIST), 100 Bureau Dr., Stop 1070, Gaithersburg, MD 20899-1070, http://www.nist.gov.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
D4607 − 14
3.3 The apparatus required consists of various laboratory glassware used to prepare solutions and contact carbon with the
standard iodine solution. Filtration and titration equipment are also required.
4. Significance and Use
4.1 The iodine number is a relative indicator of porosity in an activated carbon. It does not necessarily provide a measure of
the carbon’s ability to absorb other species. Iodine number may be used as an approximation of surface area for some types of
activated carbons (see Test Method C819). Howeve
...