ASTM D4903-99(2009)

Standard Test Method for Total Solids and Water in Vegetable Tanning Material Extracts

SIGNIFICANCE AND USE
The test method is useful in determining the total solids and water in analytical solutions.
SCOPE
1.1 This test method is intended for use in determining the total solids and water in extracts of vegetable tanning materials. The test method is applicable to solutions of liquid, solid, pasty, and powdered extracts and to extracts of raw or spent materials.
1.2 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-2009
• Technical Committee: D31 - Leather
• Drafting Committee: D31.01 - Vegetable Leather

Relations

• Replaces: ASTM D4903-99(2004) - Standard Test Method for Total Solids and Water in Vegetable Tanning Material 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-2009
• Referred By: ASTM D6408-99(2020) - Standard Test Method for Analysis of Tannery Liquors
• Effective Date: 01-Apr-2009
• Referred By: ASTM D4905-99(2020) - Standard Practice for Preparation of Solution of Solid, Pasty and Powdered Vegetable Tannin Extracts
• Effective Date: 01-Apr-2009
• Referred By: ASTM D4902-99(2020) - Standard Test Method for Evaporation and Drying of Analytical Solutions
• Effective Date: 01-Apr-2009
• Referred By: ASTM D4899-99(2020) - Standard Practice for Analysis of Vegetable Tanning Materials—General
• Effective Date: 01-Apr-2009
• Referred By: ASTM D6401-99(2020) - Standard Test Method for Determining Non-Tannins and Tannin in Extracts of Vegetable Tanning Materials
• Effective Date: 01-Apr-2009
• Referred By: ASTM D6402-99(2020) - Standard Test Method for Determining Soluble Solids and Insolubles in Extracts of Vegetable Tanning Materials
• Effective Date: 01-Apr-2009

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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: D4903 − 99 (Reapproved2009)
Standard Test Method for
Total Solids and Water in Vegetable Tanning Material
Extracts
This standard is issued under the fixed designation D4903; 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 2.2 ALCA Methods:
A20 Total Solids and Water
1.1 This test method is intended for use in determining the
total solids and water in extracts of vegetable tanning materi-
3. Summary of Test Method
als. The test method is applicable to solutions of liquid, solid,
3.1 An aliquot of the prepared analytical solution is pipetted
pasty, and powdered extracts and to extracts of raw or spent
into an evaporating dish and evaporated to dryness in a forced
materials.
air oven.
1.2 This standard does not purport to address all of the
4. Significance and Use
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro-
4.1 The test method is useful in determining the total solids
priate safety and health practices and determine the applica-
and water in analytical solutions.
bility of regulatory limitations prior to use.
5. Apparatus
2. Referenced Documents
5.1 Tannin Dish—Crystallizing dish, borosilicate glass, 50
mm tall, 70 mm outside diameter. The bottom corner shall be
2.1 ASTM Standards:
rounded to a radius of 6 mm, the bottom shall be flat and not
D4901 Practice for Preparation of Solution of Liquid Veg-
cupped in the center, and the top edge shall be rounded and
etable Tannin Extracts
polished.
D4902 Test Method for Evaporation and Drying of Analyti-
cal Solutions
5.2 Pipet, 100-mL capacity, preferably with a wide orifice
D4905 Practice for Preparation of Solution of Solid, Pasty
approximately 2.4 mm ( ⁄32 in.) diameter and 15 to 25-s
and Powdered Vegetable Tannin Extracts
delivery time.
D6401 Test Method for Determining Non-Tannins and Tan-
5.3 Drying Oven—A forced-air convection oven (or
nin in Extracts of Vegetable Tanning Materials
mechanical-convection draft oven) capable of maintaining a
D6402 Test Method for Determining Soluble Solids and
temperature of 100 6 2.0° C.
Insolubles in Extracts of Vegetable Tanning Materials
D6404 Practice for Sampling Vegetable Materials Contain- 5.4 Thermometer—Accurate to 6 2.0° C, used to check and
monitor the oven set point.
ing Tannin
D6405 Practice for Extraction of Tannins from Raw and
5.5 Dessicator—Any convenient form or size.
Spent Materials
6. Test Specimen
6.1 The specimen shall consist of 100 mL of a solution
This test method is under the jurisdiction ofASTM Committee D31 on Leather
prepared as described in Practices D4901, D4905, and D6405.
and is the direct responsibility of Subcommittee D31.01 on Vegetable Leather This
test method has been adapted from and is a replacement for Method A20 of the
7. Procedure
Official Methods of the American Leather Chemists Association.
Current edition approved April 1, 2009. Published July 2009. Originally 7.1 Thoroughly mix the solution, prepared as described in
approved in 1989. Last previous edition approved in 2004 as D4903–99 (2004).
Practices D4901, D4905, and D6405, by inverting and shaking
DOI: 10.1520/D4903-99R09.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Official Methods of the American Leather Chemists Association. Available
Standards volume information, refer to the standard’s Document Summary page on from the American Leather Chemists Association, University of Cincinnati, P.O.
the ASTM website. Box 210014, Cincinnati, OH 45221.
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D4903 − 99 (2009)
8 to 10 times, taking care to ensure that all insoluble matter is 8.2 Since two specimens of each sample were taken in
uniformly dispersed and none left adhering to the walls of the preparing the solutions (Practices D4901, D4905, and D6405),
flask.Immediately,poura150-mLto250-mLportion(approxi- two values for total solids will be obtained for each extract or
mately) into a bottle or
...