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ASTM D 7026 Document Information:
Title
Standard Guide for Sampling and Reporting of Results for Determination of Biobased Content of Materials via Carbon Isotope Analysis
ASTM International
Publication Date:
May 1, 2004
Scope:
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 D 6866. 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.
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.
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.
Carbon isotope analysis involves thermal processing in presence of
oxidants. Compatibility of any
given material with Test Methods D 6866 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.
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 similar or equivalent ISO standard.
Keywords:
- biobased
- radioisotope authentication
- sampling
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