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ASTM D4903-99(2020)

(Test Method)

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

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

SIGNIFICANCE AND USE
4.1 This 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.3 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

General Information

Status
Published
Publication Date
30-Nov-2020
ICS
59.140.10 - Processes and auxiliary materials
Technical Committee
D31 - Leather
Drafting Committee
D31.01 - Vegetable Leather
Current Stage
Ref Project

Relations

Refers
ASTM D4901-99(2009) - Standard Practice for Preparation of Solution of Liquid Vegetable Tannin Extracts
Effective Date
01-Apr-2009
Refers
ASTM D4902-99(2009) - Standard Test Method for Evaporation and Drying of Analytical Solutions
Effective Date
01-Apr-2009
Refers
ASTM D6401-99(2009) - Standard Test Method for Determining Non-Tannins and Tannin in Extracts of Vegetable Tanning Materials
Effective Date
01-Apr-2009
Refers
ASTM D6404-99(2009) - Standard Practice for Sampling Vegetable Materials Containing Tannin
Effective Date
01-Apr-2009
Refers
ASTM D4905-99(2009) - Standard Practice for Preparation of Solution of Solid, Pasty and Powdered Vegetable Tannin Extracts
Effective Date
01-Apr-2009
Refers
ASTM D6405-99(2009) - Standard Practice for Extraction of Tannins from Raw and Spent Materials
Effective Date
01-Apr-2009
Refers
ASTM D6402-99(2009) - Standard Test Method for Determing Soluble Solids and Insolubles in Extracts of Vegetable Tanning Materials
Effective Date
01-Apr-2009
Refers
ASTM D6401-99(2004) - Standard Test Method for Determining Non-Tannins and Tannin in Extracts of Vegetable Tanning Materials
Effective Date
01-Apr-2004
Refers
ASTM D4901-99(2004) - Standard Practice for Preparation of Solution of Liquid Vegetable Tannin Extracts
Effective Date
01-Apr-2004
Refers
ASTM D6404-99(2004) - Standard Practice for Sampling Vegetable Materials Containing Tannin
Effective Date
01-Apr-2004
Refers
ASTM D6402-99(2004) - Standard Test Method for Determing Soluble Solids and Insolubles in Extracts of Vegetable Tanning Materials
Effective Date
01-Apr-2004
Refers
ASTM D4902-99(2004) - Standard Test Method for Evaporation and Drying of Analytical Solutions
Effective Date
01-Apr-2004
Refers
ASTM D4905-99(2004) - Standard Practice for Preparation of Solution of Solid, Pasty and Powdered Vegetable Tannin Extracts
Effective Date
01-Apr-2004
Refers
ASTM D6405-99(2004) - Standard Practice for Extraction of Tannins from Raw and Spent Materials
Effective Date
01-Apr-2004
Refers
ASTM D4901-99 - Standard Practice for Preparation of Solution of Liquid Vegetable Tannin Extracts
Effective Date
10-May-1999

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ASTM D4903-99(2020) - Standard Test Method for Total Solids and Water in Vegetable Tanning Material ExtractsASTM D4903-99(2020) - Standard Test Method for Total Solids and Water in Vegetable Tanning Material Extracts
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ASTM D4903-99(2020) - Standard Test Method for Total Solids and Water in Vegetable Tanning Material Extracts
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Standards Content (Sample)


This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: D4903 − 99 (Reapproved 2020)
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 D6405 Practice for Extraction of Tannins from Raw and
Spent Materials
1.1 This test method is intended for use in determining the
2.2 ALCA Methods:
total solids and water in extracts of vegetable tanning materi-
A20 Total Solids and Water
als. The test method is applicable to solutions of liquid, solid,
pasty, and powdered extracts, and to extracts of raw or spent
3. Summary of Test Method
materials.
3.1 An aliquot of the prepared analytical solution is pipetted
1.2 This standard does not purport to address all of the
into an evaporating dish and evaporated to dryness in a forced
safety concerns, if any, associated with its use. It is the
air oven.
responsibility of the user of this standard to establish appro-
priate safety, health, and environmental practices and deter-
4. Significance and Use
mine the applicability of regulatory limitations prior to use.
4.1 This test method is useful in determining the total solids
1.3 This international standard was developed in accor-
and water in analytical solutions.
dance with internationally recognized principles on standard-
ization established in the Decision on Principles for the
5. Apparatus
Development of International Standards, Guides and Recom-
5.1 Tannin Dish—Crystallizing dish, borosilicate glass, 50
mendations issued by the World Trade Organization Technical
mm tall, 70 mm outside diameter. The bottom corner shall be
Barriers to Trade (TBT) Committee.
rounded to a radius of 6 mm, the bottom shall be flat and not
2. Referenced Documents cupped in the center, and the top edge shall be rounded and
2 polished.
2.1 ASTM Standards:
D4901 Practice for Preparation of Solution of Liquid Veg- 5.2 Pipet, 100-mL capacity, preferably with a wide orifice
approximately 2.4 mm ( ⁄32 in.) diameter and 15 to 25-s
etable Tannin Extracts
D4902 Test Method for Evaporation and Drying of Analyti- delivery time.
cal Solutions
5.3 Drying Oven—A forced-air convection oven (or
D4905 Practice for Preparation of Solution of Solid, Pasty
mechanical-convection draft oven) capable of maintaining a
and Powdered Vegetable Tannin Extracts
temperature of 100 6 2.0 °C.
D6401 Test Method for Determining Non-Tannins and Tan-
5.4 Thermometer—Accurate to 62.0 °C, used to check and
nin in Extracts of Vegetable Tanning Materials
monitor the oven set point.
D6402 Test Method for Determining Soluble Solids and
Insolubles in Extracts of Vegetable Tanning Materials 5.5 Dessicator—Any convenient form or size.
D6404 Practice for Sampling Vegetable Materials Contain-
6. Test Specimen
ing Tannin
6.1 The specimen shall consist of 100 mL of a solution
prepared as described in Practices D4901, D4905, and D6405.
This test method is under the jurisdiction ofASTM Committee D31 on Leather
and is the direct responsibility of Subcommittee D31.01 on Vegetable Leather. This
7. Procedure
test method has been adapted from, and is a replacement for, Method A20 of the
Official Methods of the American Leather Chemists Association.
7.1 Thoroughly mix the solution, prepared as described in
Current edition approved Dec. 1, 2020. Published December 2020. Originally
Practices D4901, D4905, and D6405, by inverting and shaking
approved in 1989. Last previous edition approved in 2016 as D4903–99 (2016).
DOI: 10.1520/D4903-99R20.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. 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.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
D4903 − 99 (2020)
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 is left adhering to the wa
...

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SIGNIFICANCE AND USE
4.1 The concentration of tannin in extracts must be reduced to analytical strength (4 g tannin per L) for analysis.  
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