ASTM D7026-13
(Guide)Standard Guide for Sampling and Reporting of Results for Determination of Biobased Content of Materials via Carbon Isotope Analysis (Withdrawn 2020)
Standard Guide for Sampling and Reporting of Results for Determination of Biobased Content of Materials via Carbon Isotope Analysis (Withdrawn 2020)
SIGNIFICANCE AND USE
4.1 The carbon isotope analysis is designed to be an adjunct to other information in determination of biobased content, specifically the manufacturer’s records. It is also a means of verifying the authenticity of a disputed lot of material which may be manufactured by different means, from different raw materials. FTIR or other chemical analysis means will identify the molecule as being ethanol, but not give indication of the source (that is, fossil carbon versus modern carbon). The carbon isotopes will give both indication of source and the presence of a mixture of sources.
4.2 Representative sampling and handling methods are clearly a prerequisite to obtaining accurate results from the radiocarbon composition determination and any other quantitative analytical method.
4.3 This guide provides for accurate and complete reporting of the sample collection, handling, chain of custody, sample preparation and treatment that allows any independent party to assess the validity of the reported biobased content of the material.
SCOPE
1.1 This guide provides a framework for collecting and handling samples for determination of biobased content of materials by means of the carbon isotope method described in Test Methods D6866. Tests for sampling adequacy based on the standard statistical tools are provided. In addition, reporting of the results, including sampling techniques and handling procedures and chain-of-custody issues are discussed.
1.2 This guide is concerned with collecting representative samples within a given material or a lot, not with lot-to-lot variations such as considered in quality control schemes.
1.3 Biobased materials often represent sampling problems specific to a given material, such as heterogeneity, and so forth, which require employment of material-specific sampling methods. The use of specialized sampling methods already accepted and validated by industries that manufacture and/or use the biomaterial is encouraged. However, all sampling techniques, especially non-standard techniques developed for specific materials must be reported in sufficient detail to allow critical assessment of the techniques used.
1.4 Carbon isotope analysis involves thermal processing in presence of oxidants. Compatibility of any given material with Test Methods D6866 must be assessed. Special attention must be given to materials with potential for explosion hazards, such as peroxides, nitrated compounds, azides, and so forth. Examples of peroxide-forming compounds are ethers, some ketones and a number of other compounds.
1.5 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.6 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 requirements prior to use.Note 1—There is no known ISO equivalent to this standard.
WITHDRAWN RATIONALE
This guide provides a framework for collecting and handling samples for determination of biobased content of materials by means of the carbon isotope method described in Test Methods D6866. Tests for sampling adequacy based on the standard statistical tools are provided. In addition, reporting of the results, including sampling techniques and handling procedures and chain-of-custody issues are discussed.
Formerly under the jurisdiction of Committee D20 on Plastics, this guide was withdrawn in October 2020. This standard is being withdrawn without replacement due to its limited use by industry.
General Information
Standards Content (Sample)
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation: D7026 − 13
Standard Guide for
Sampling and Reporting of Results for Determination of
Percent Biobased Content of Materials via Carbon Isotope
1
Analysis
This standard is issued under the fixed designation D7026; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
INTRODUCTION
The biobased content of a material and the resources consumed in creation of the material, both
energy and raw materials are defined in Guide D6852. These resources are expressed as carbon
equivalent. Percent Biobased Carbon Content represents new or recently fixed carbon, opposed to
fossil carbon fixed millions of years ago. Test Methods D6866 presents two methods for experimen-
tally determining the percentage of recently fixed carbon in a sample by means of its radioisotope
content, allowing direct determination of its biobased content. The following guide represents a
companion document to Test Methods D6866 and defines the sampling and sample handling
procedures for the radioisotope methods for determination of biobased content.
There are a great variety of biobased materials that may be tested using one of the radioisotope
methods, with a wide range of physical characteristics and special sampling problems.
It is not the intent of this guide to provide specific sample collection and handling instructions for
a specific material. Rather, the guide presents general outlines to be followed in sampling procedures
and encourages the use of existing material-specific sampling procedures validated by extensive use
in industry. The emphasis in the guide is to provide thorough and transparent reporting that allows
subsequent evaluation of the validity of the claims regards biobased content.
1. Scope and validated by industries that manufacture and/or use the
biomaterial is encouraged. However, all sampling techniques,
1.1 This guide provides a framework for collecting and
especially non-standard techniques developed for specific ma-
handling samples for determination of biobased content of
terials must be reported in sufficient detail to allow critical
materials by means of the carbon isotope method described in
assessment of the techniques used.
Test Methods D6866. Tests for sampling adequacy based on
thestandardstatisticaltoolsareprovided.Inaddition,reporting
1.4 Carbon isotope analysis involves thermal processing in
of the results, including sampling techniques and handling
presence of oxidants. Compatibility of any given material with
procedures and chain-of-custody issues are discussed.
Test Methods D6866 must be assessed. Special attention must
1.2 This guide is concerned with collecting representative begiventomaterialswithpotentialforexplosionhazards,such
samples within a given material or a lot, not with lot-to-lot
as peroxides, nitrated compounds, azides, and so forth. Ex-
variations such as considered in quality control schemes. amples of peroxide-forming compounds are ethers, some
ketones and a number of other compounds.
1.3 Biobased materials often represent sampling problems
specifictoagivenmaterial,suchasheterogeneity,andsoforth,
1.5 The values stated in SI units are to be regarded as
whichrequireemploymentofmaterial-specificsamplingmeth-
standard. No other units of measurement are included in this
ods.Theuseofspecializedsamplingmethodsalreadyaccepted
standard.
1.6 This standard does not purport to address all of the
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This guide is under the jurisdiction of ASTM Committee D20 on Plastics and safety concerns, if any, associated with its use. It is the
isthedirectresponsibilityofSubcommitteeD20.96onEnvironmentallyDegradable
responsibility of the user of this standard to establish appro-
Plastics and Biobased Products.
priate safety and health practices and determine the applica-
Current edition approved April 1, 2013. Published April 2013. Originally
bility of regulatory requirements prior to use.
approvedin2004.Lastpreviouseditionapprovedin2004asD7026-04,whichwas
withdrawn January 2013 and reinstated with revisions inApril 2013. DOI:10.1520/
D7026-13. NOTE 1—There is no known ISO equivalent to this standard.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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D7026 − 13
2. Referenced Documents specifically the manufacturer’s records. It is also a means of
2 verifying the authenticity of a disputed lot of material which
2.1 ASTM Standards:
may be manufactured by different means, from different raw
D6852Guide for Determination of Biobased Content, Re-
materials. FTIR or other chemical analysis means w
...
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