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ASTM D7633-13

(Test Method)

Standard Test Method for Carbon Black—Carbon Content

Standard Test Method for Carbon Black—Carbon Content

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.
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 to 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
31-Oct-2013
ICS
71.060.10 - Chemical elements
Technical Committee
D24 - Carbon Black
Drafting Committee
D24.66 - Environment, Health, and Safety
Current Stage
Ref Project

Relations

Replaces
ASTM D7633-10b - Standard Test Method for Carbon Black(em dash)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-Nov-2013

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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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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 − 13
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 resulting in complete combustion. Carbon in the sample is
oxidized to carbon dioxide. Moisture and particulates are
1.1 This test method covers the instrumental determination
removed from the gas stream by traps filled with anhydrous
of carbon content in a carbon black sample. Values obtained
magnesium perchlorate. The gas stream is then passed through
represent the total carbon content.
a cell in which carbon dioxide concentration is measured by an
1.2 The method is applicable to tread, carcass and specialty
infrared (IR) absorption detector at a precise wavelength in the
type carbon blacks obtained from partial combustion or ther-
IR spectrum.
mal decomposition processes, which typically contain 95 to
3.2 This test method is for use with commercially available
100 % carbon.
carbon analyzers equipped to carry out the combustion and
1.3 The results of these tests can be expressed as mass %
measurement operations automatically.
carbon.
3.3 The carbon analyzer must be calibrated using an appro-
1.4 The values stated in SI units are to be regarded as
priate calibration standard (see 6.4).
standard. No other units of measurement are included in this
standard.
4. Significance and Use
1.5 This standard does not purport to address all of the
4.1 The total carbon content of a carbon black is a require-
safety concerns, if any, associated with its use. It is the
ment for the calculation and reporting of carbon dioxide
responsibility of the user of this standard to establish appro-
emissions. It can also be used in calculations to estimate yield
priate safety and health practices and determine the applica-
of the process.
bility of regulatory limitations prior to use.
5. Apparatus
2. Referenced Documents
5.1 Analytical Balance,orequivalent,capableofaweighing
2
2.1 ASTM Standards:
sensitivity of 1 mg or better resolution.
D1799 Practice for Carbon Black—Sampling Packaged
5.2 Gravity Convection Drying Oven, capable of maintain-
Shipments
ing 125 6 5°C.
D1900 Practice for Carbon Black—Sampling Bulk Ship-
ments 5.3 Measurement Apparatus, equipped to automatically
D4483 Practice for Evaluating Precision for Test Method combust the sample and measure carbon content.
Standards in the Rubber and Carbon Black Manufacturing
5.4 Combustion tube and boat made of a suitable material
Industries
such as mullite, porcelain or zircon.
3. Summary of Test Method
6. Reagents
3.1 Inthistestmethod,asampleisweighedinacombustion
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-
tee onAnalytical Reagents of theAmerican Chemical Society,
3
1
This test method is under the jurisdiction ofASTM Committee D24 on Carbon
where such specifications are available. Other grades may be
Black and is the direct responsibility of Subcommittee D24.66 on Environment,
used, provided it is first ascertained that the reagent is of
Health, and Safety.
Current edition approved Nov. 1, 2013. Published December 2013. Originally
approved in 2010. Last previous edition approved in 2010 as D7633 – 10b. DOI:
3
10.1520/D7633-13. “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 service@astm.org. 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

---------------------- Page: 1 ----------------------
D7633 − 13
sufficiently high purity to permit its use without lessening the 10.6 Initiate the analysis and place the sample in the
accuracy of the determination. instrument using a boat puller or the auto-sampler mechanism.
6.2 Magnesium Perchlorate. 10.7 When the analysis is complete, the instrument sh
...

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 − 10b D7633 − 13
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 % 95 to 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 Black—Sampling Packaged Shipments
D1900 Practice for Carbon Black—Sampling Bulk Shipments
D4483 Practice for Evaluating Precision for Test Method Standards in the Rubber and Carbon Black Manufacturing Industries
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.
1
This test method is under the jurisdiction of ASTM Committee D24 on Carbon Black and is the direct responsibility of Subcommittee D24.66 on Environment, Health,
and Safety.
Current edition approved Dec. 1, 2010Nov. 1, 2013. Published January 2011December 2013. Originally approved in 2010. Last previous edition approved in 2010 as
D7633 – 10a.D7633 – 10b. DOI: 10.1520/D7633-10B.10.1520/D7633-13.
2
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 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 − 13
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
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
...

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1.1 This test method provides a practical determination for the percentage of moisture in a graphite sample.  
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