ASTM D6404-99(2009)
(Practice)Standard Practice for Sampling Vegetable Materials Containing Tannin
Standard Practice for Sampling Vegetable Materials Containing Tannin
SIGNIFICANCE AND USE
This practice provides standard procedures for obtaining representative samples of various materials used as a source of tannins for the tanning industry.
Procedures are described for obtaining representative samples of economical and convenient quantities from a lot, or sections of a lot, of material for examination and analysis so that agreement may be reached with regard to the extent of variation of quality in different portions of a lot and the average quality of the entire lot of material.
No directions for sampling, however explicit, can take the place of judgment, skill, and previous experience on the part of persons actually engaged in the sampling or the supervision of the sampling. These directions are intended to supplement that experience and, particularly, to serve as a guide in the selection of the method which is to be used, in common, by each of two or more contracting parties.
Tanning materials contain moisture in varying amounts, depending both on the nature of the material and on the climatic conditions, so that sampling must be carried out as quickly as is consistent with thoroughness in order to avoid changes in moisture content.
SCOPE
1.1 This practice covers obtaining representative samples from shipment lots of botanical materials containing tannin.
1.2 The values stated in SI units are to be regarded as the standard. The inch-pound units given in parentheses are for information only.
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.
General Information
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Standards Content (Sample)
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation: D6404 − 99 (Reapproved2009)
Standard Practice for
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Sampling Vegetable Materials Containing Tannin
This standard is issued under the fixed designation D6404; 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 which have the chemical and physical properties necessary to
convert animal hides and skins into leather.
1.1 This practice covers obtaining representative samples
from shipment lots of botanical materials containing tannin.
4. Summary of Practice
1.2 The values stated in SI units are to be regarded as the
4.1 This practice describes methods for obtaining represen-
standard. The inch-pound units given in parentheses are for
tative samples for analysis from shipments of vegetable tan-
information only.
ning materials and tannin extracts.
1.3 This standard does not purport to address all of the
5. Significance and Use
safety concerns, if any, associated with its use. It is the
5.1 Thispracticeprovidesstandardproceduresforobtaining
responsibility of the user of this standard to establish appro-
representative samples of various materials used as a source of
priate safety and health practices and determine the applica-
tannins for the tanning industry.
bility of regulatory limitations prior to use.
5.2 Procedures are described for obtaining representative
2. Referenced Documents
samples of economical and convenient quantities from a lot, or
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sections of a lot, of material for examination and analysis so
2.1 ASTM Standards:
that agreement may be reached with regard to the extent of
D1517 Terminology Relating to Leather
variationofqualityindifferentportionsofalotandtheaverage
2.2 ALCA Method:
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quality of the entire lot of material.
J10 Sampling Vegetable Materials Containing Tannin
5.3 No directions for sampling, however explicit, can take
3. Terminology
the place of judgment, skill, and previous experience on the
3.1 Definitions:
part of persons actually engaged in the sampling or the
3.1.1 For definitions of general leather and tanning terms
supervision of the sampling. These directions are intended to
used in this practice refer to Terminology D1517.
supplement that experience and, particularly, to serve as a
3.1.2 quartering—the term applied to a method described in
guide in the selection of the method which is to be used, in
this practice of reducing the size of samples without impairing
common, by each of two or more contracting parties.
their representative quality.
5.4 Tanning materials contain moisture in varying amounts,
3.1.3 tannin—an astringent substance found in the various
depending both on the nature of the material and on the
parts of plants such as bark, wood, leaves, nuts, fruits, roots,
climatic conditions, so that sampling must be carried out as
etc.
quickly as is consistent with thoroughness in order to avoid
3.1.4 vegetable tannins—mixtures of substances (natural changes in moisture content.
products) obtained from plant tissues by water extraction
6. Apparatus
6.1 Balance, analytical balance which will weigh the quan-
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This practice is under the jurisdiction ofASTM Committee D31 on Leather and
tity of material specified in this practice to an accuracy of 610
is the direct responsibility of Subcommittee D31.01 on Vegetable Leather. This test
g(6 0.35 oz).
method has been adapted from and is a replacement for Method J10 of the Official
Methods of the American Leather Chemists Association.
6.2 Canvas, 11-oz weight and of sufficient size (as deter-
Current edition approved April 1, 2009. Published July 2009. Originally
mined by the discretion of the sampler or analyst) for use in
approved in 1999. Last previous edition approved in 2004 as D6404 – 99 (2004).
mixing and quartering samples.
DOI: 10.1520/D6404-99R09.
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For referenced ASTM standards, visit the ASTM website, www.astm.org, or
6.3 Sieve, with round openings 1.27 cm (0.50 in.) in
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
diameter.
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.
6.4 Sampling Tool, this tool shall be made of brass or other
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Official Methods of the American Leather Chemists Association. Available
corrosion-resistant metal tubing, with solid handle attached,
from the American Leather Chemists Association, University of Cincinnati, P.O.
Box 210014, Cincinnati, OH 45221-0014. similar to that described below and illustrated in Fig. 1.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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D6404
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