ASTM D4904-99(2004)

Standard Practice for Preparation of Solution of Liquid Vegetable Tannin Extracts

SIGNIFICANCE AND USE
The solubility of extracts is influenced by temperature. The analytical solutions prepared from tanning extracts are dissolved or diluted in hot water. It is necessary to exercise caution in cooling these solutions and to do so in such a way as to avoid chilling, under-cooling, or uneven cooling of the solutions.
SCOPE
1.1 This practice covers the preparation of a solution of liquid extract that is to be used in the tannin analysis of that extract.
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-Mar-2004
• Technical Committee: D31 - Leather
• Drafting Committee: D31.01 - Vegetable Leather

Relations

• Replaces: ASTM D4904-99 - Standard Practice for Cooling of Analytical Solutions
• Effective Date: 01-Apr-2004
• Replaced By: ASTM D4904-99(2009) - Standard Practice for Preparation of Solution of Liquid Vegetable Tannin Extracts
• Effective Date: 01-Apr-2009
• Referred By: ASTM D6405-99(2020) - Standard Practice for Extraction of Tannins from Raw and Spent Materials
• Effective Date: 01-Apr-2004
• Referred By: ASTM D4905-99(2020) - Standard Practice for Preparation of Solution of Solid, Pasty and Powdered Vegetable Tannin Extracts
• Effective Date: 01-Apr-2004
• Referred By: ASTM D6410-99(2020) - Standard Test Method for Determining Acidity of Vegetable Tanning Liquors
• Effective Date: 01-Apr-2004
• Referred By: ASTM D6408-99(2020) - Standard Test Method for Analysis of Tannery Liquors
• Effective Date: 01-Apr-2004
• Referred By: ASTM D4899-99(2020) - Standard Practice for Analysis of Vegetable Tanning Materials—General
• Effective Date: 01-Apr-2004
• Referred By: ASTM D4901-99(2020) - Standard Practice for Preparation of Solution of Liquid Vegetable Tannin Extracts
• Effective Date: 01-Apr-2004

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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:D4904–99(Reapproved2004)
Standard Practice for
Cooling of Analytical Solutions
This standard is issued under the fixed designation D 4904; 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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope 3. Summary of Practice
1.1 This practice covers a standard procedure for the cool- 3.1 This practice specifies a procedure to follow in cooling
ing of analytical solutions such as those prepared Practices to standard or room temperature the hot analytical solutions
D 4901, D 4905, or D 6405. The tannin analysis results for an prepared from tanning materials for Practices D 4901, D 4905,
analytical solution are to some extent dependent on the or D 6405.
conditions of the cooling of that solution.
4. Significance and Use
1.2 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the 4.1 The solubility of extracts is influenced by temperature.
The analytical solutions prepared from tanning extracts are
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica- dissolved or diluted in hot water. It is necessary to exercise
caution in cooling these solutions and to do so in such a way
bility of regulatory limitations prior to use.
as to avoid chilling, under-cooling, or uneven cooling of the
2. Referenced Documents
solutions.
2.1 ASTM Standards:
5. Specimen
D 4901 Practice for Preparation of Solution of Liquid Veg-
5.1 The specimen shall be the 1-Lor 2-Lsolutions prepared
etable Tannin Extracts
D 4905 Practice for Preparation of Solution of Solid, Pasty under Practices D 4901, D 4905, or D 6405.
and Powdered Vegetable Tannin Extracts
6. Procedure
D 6405 Practice for Extraction of Tannins from Raw and
6.1 The prepared solutions shall be protected from drafts
Spent Materials
and shall be allowed to stand overnight in an ambient tempera-
2.2 ALCA Methods:
ture of not less than 23°C, nor more than 28°C. After their
A12 Cooling of Analytical Solutions
temperature has been adjusted, the solutions shall be made up
to the mark with distilled water at 23°C. Where a constant
This practice is under the jurisdiction ofASTM Committee D31 on Leather and
temperatureroomisav
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