ASTM D7633-10b

Standard Test Method for Carbon Black(em dash)Carbon Content

SIGNIFICANCE AND USE
The total carbon content of a carbon black is a requirement for the calculation and reporting of carbon dioxide emissions. It can also be used in calculations to estimate yield of the process.
SCOPE
1.1 This test method covers the instrumental determination of carbon content in a carbon black sample. Values obtained represent the total carbon content.
1.2 The method is applicable to tread, carcass and specialty type carbon blacks obtained from partial combustion or thermal decomposition processes, which typically contain 95-100 % carbon.  
1.3 The results of these tests can be expressed as mass % carbon.
1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.5 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.

General Information

• Status: Historical
• Publication Date: 30-Nov-2010
• ICS: 71.060.10 - Chemical elements
• Technical Committee: D24 - Carbon Black
• Drafting Committee: D24.66 - Environment, Health, and Safety

Relations

• Replaces: ASTM D7633-10a - Standard Test Method for Carbon Black<char: emdash>CARBON CONTENT
• Effective Date: 01-Dec-2010
• Replaced By: ASTM D7633-13 - Standard Test Method for Carbon Black&mdash;Carbon Content
• Effective Date: 01-Nov-2013
• Referred By: ASTM D7662-15(2020) - Standard Test Method for Carbon Content in Carbon Black Feedstock Oils
• Effective Date: 01-Dec-2010

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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: D7633 − 10b
StandardTest Method for
1
Carbon Black—Carbon Content
This standard is issued under the fixed designation D7633; 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 magnesium perchlorate. The gas stream is then passed through
a cell in which carbon dioxide concentration is measured by an
1.1 This test method covers the instrumental determination
infrared (IR) absorption detector at a precise wavelength in the
of carbon content in a carbon black sample. Values obtained
IR spectrum.
represent the total carbon content.
3.2 This test method is for use with commercially available
1.2 The method is applicable to tread, carcass and specialty
carbon analyzers equipped to carry out the combustion and
type carbon blacks obtained from partial combustion or ther-
measurement operations automatically.
mal decomposition processes, which typically contain 95-
100 % carbon. 3.3 The carbon analyzer must be calibrated using an appro-
priate calibration standard (see 6.4).
1.3 The results of these tests can be expressed as mass %
carbon.
4. Significance and Use
1.4 The values stated in SI units are to be regarded as
4.1 The total carbon content of a carbon black is a require-
standard. No other units of measurement are included in this
ment for the calculation and reporting of carbon dioxide
standard.
emissions. It can also be used in calculations to estimate yield
1.5 This standard does not purport to address all of the
of the process.
safety concerns, if any, associated with its use. It is the
5. Apparatus
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica-
5.1 Analytical Balance,orequivalent,capableofaweighing
bility of regulatory limitations prior to use.
sensitivity of 1 mg or better resolution.
5.2 Gravity Convection Drying Oven, capable of maintain-
2. Referenced Documents
ing 125 6 5°C.
2
2.1 ASTM Standards:
5.3 Measurement Apparatus, equipped to automatically
D1799 Practice for Carbon Black—Sampling Packaged
combust the sample and measure carbon content.
Shipments
D1900 Practice for Carbon Black—Sampling Bulk Ship-
5.4 Combustion tube and boat made of a suitable material
ments
such as mullite, porcelain or zircon.
3. Summary of Test Method
6. Reagents
3.1 In this test method, a sample is weighed in a combustion
6.1 Purity of Reagents—Reagent grade chemicals shall be
boat and the carbon content is determined by placing the boat
used in all tests. Unless otherwise indicated, it is intended that
in a tube furnace operating at 1350°C in a stream of oxygen
all reagents shall conform to the specifications of the Commit-
resulting in complete combustion. Carbon in the sample is
tee onAnalytical Reagents of theAmerican Chemical Society,
oxidized to carbon dioxide. Moisture and particulates are 3
where such specifications are available. Other grades may be
removed from the gas stream by traps filled with anhydrous
used, provided it is first ascertained that the reagent is of
sufficiently high purity to permit its use without lessening the
1
accuracy of the determination.
This test method is under the jurisdiction ofASTM Committee D24 on Carbon
Black and is the direct responsibility of Subcommittee D24.66 on Environment,
6.2 Magnesium Perchlorate.
Health, and Safety.
Current edition approved Dec. 1, 2010. Published January 2011. Originally
approved in 2010. Last previous edition approved in 2010 as D7633 – 10a. DOI:
3
10.1520/D7633-10B. “Reagent Chemicals,” American Chemical Society Specifications, American
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or Chemical Society, Washington, DC. For suggestions on the testing of reagents not
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM listed by the American Chemical Society, see Analar Standards for Laboratory
Standards volume information, refer to the standard’s Document Summary page on Chemicals, BDH Ltd., Poole, Dorset, U.K. and the United States Pharmacopeia and
the ASTM website. National Formulary, U.S. Pharmacopeial Convention, Inc. (USPC), Rockville, MD.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

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D7633 − 10b
6.3 Oxygen, high purity, 99.9 %. 10. Procedure
4
6.4 Calibration standard. 10.1 Sample Preparation—Dry an adequate sample of the
carbon black for at least1hina gravity-convection oven set at
7. Sampling
125 65°C,inanopencontainerofsuitabledimensions,sothat
the depth of black is no m
...

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:D7633–10a Designation:D7633–10b
Standard Test Method for
1
Carbon Black—Carbon Content
This standard is issued under the fixed designation D7633; 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 instrumental determination of carbon content in a carbon black sample. Values obtained
represent the total carbon content.
1.2 The method is applicable to tread, carcass and specialty type carbon blacks obtained from partial combustion or thermal
decomposition processes, which typically contain 95-100 % carbon.
1.3 The results of these tests can be expressed as mass % carbon.
1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.5 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.
2. Referenced Documents
2
2.1 ASTM Standards:
D1799 Practice for Carbon BlackSampling Packaged Shipments
D1900 Practice for Carbon BlackSampling Bulk Shipments
3. Summary of Test Method
3.1 In this test method, a sample is weighed in a combustion boat and the carbon content is determined by placing the boat in
a tube furnace operating at 1350°C in a stream of oxygen resulting in complete combustion. Carbon in the sample is oxidized to
carbon dioxide. Moisture and particulates are removed from the gas stream by traps filled with anhydrous magnesium perchlorate.
The gas stream is then passed through a cell in which carbon dioxide concentration is measured by an infrared (IR) absorption
detector at a precise wavelength in the IR spectrum.
3.2 This test method is for use with commercially available carbon analyzers equipped to carry out the combustion and
measurement operations automatically.
3.3 The carbon analyzer must be calibrated using an appropriate calibration standard (see 6.4).
4. Significance and Use
4.1 The total carbon content of a carbon black is a requirement for the calculation and reporting of carbon dioxide emissions.
It can also be used in calculations to estimate yield of the process.
5. Apparatus
5.1 Analytical Balance, or equivalent, capable of a weighing sensitivity of 1 mg or better resolution.
5.2 Gravity Convection Drying Oven, capable of maintaining 125 6 5°C.
5.3 Measurement Apparatus, equipped to automatically combust the sample and measure carbon content.
5.4 Combustion tube and boat made of a suitable material such as mullite, porcelain or zircon.
6. Reagents
6.1 Purity of Reagents—Reagent grade chemicals shall be used in all tests. Unless otherwise indicated, it is intended that all
reagents shall conform to the specifications of the Committee on Analytical Reagents of the American Chemical Society, where
1
This test method is under the jurisdiction ofASTM Committee D24 on Carbon Black and is the direct responsibility of Subcommittee D24.66 on Environment, Health,
and Safety.
Current edition approved Oct. 15,Dec. 1, 2010. Published December 2010.January 2011. Originally approved in 2010. Last previous edition approved in 2010 as
D7633 – 10a. DOI: 10.1520/D7633-10AB.
2
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM 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.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1

---------------------- Page: 1 ----------------------
D7633–10b
3
such specifications are available. Other grades may be used, provided it is first ascertained that the reagent is of sufficiently high
purity to permit its use without lessening the accuracy of the determination.
6.2 Magnesium Perchlorate.
6.3 Oxygen, high purity, 99.9 %.
4
6.4 Calibration standard.
7. Sampling
7.1 Samples of candidate carbon blacks shall be taken in accordance with Practice D1799 or D1900.
8. Preparation of Apparatus
8.1 Assemble the apparatus according to the manufacturer’s instructions.
8.2Stabilize the furnace temperature at 1350°C.
8.2 Stabilize the furnace temperature at 1350
...