ASTM D4903-99(2004)
(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
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.
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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:D4903–99(Reapproved2004)
Standard Test Method for
Total Solids and Water in Vegetable Tanning Material
Extracts
This standard is issued under the fixed designation D 4903; 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 Test Method
1.1 This test method is intended for use in determining the 3.1 An aliquot of the prepared analytical solution is pipetted
total solids and water in extracts of vegetable tanning materi- into an evaporating dish and evaporated to dryness in a forced
als. The test method is applicable to solutions of liquid, solid, air oven.
pasty, and powdered extracts and to extracts of raw or spent
4. Significance and Use
materials.
4.1 The test method is useful in determining the total solids
1.2 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the and water in analytical solutions.
responsibility of the user of this standard to establish appro-
5. Apparatus
priate safety and health practices and determine the applica-
5.1 Tannin Dish—Crystallizing dish, borosilicate glass, 50
bility of regulatory limitations prior to use.
mm tall, 70 mm outside diameter. The bottom corner shall be
2. Referenced Documents
rounded to a radius of 6 mm, the bottom shall be flat and not
cupped in the center, and the top edge shall be rounded and
2.1 ASTM Standards:
D 4901 Practice for Preparation of Solution of Liquid Veg- polished.
5.2 Pipet, 100-mL capacity, preferably with a wide orifice
etable Tannin Extracts
D 4902 Practice for Evaporation and Drying of Analytical approximately 2.4 mm ( ⁄32 in.) diameter and 15 to 25-s
delivery time.
Solutions
D 4905 Practice for Preparation of Solution of Solid, Pasty 5.3 Drying Oven—A forced-air convection oven (or
and Powdered Vegetable Tannin Extracts mechanical-convection draft oven) capable of maintaining a
temperature of 100 6 2.0° C.
D 6401 Test Method for Determining Non-Tannins and
Tannin in Extracts of Vegetable Tanning Materials 5.4 Thermometer—Accurate to 6 2.0° C, used to check and
monitor the oven set point.
D 6402 Test Methods for Determining Soluble Solids and
Insolubles in Extracts of Vegetable Tanning Materials 5.5 Dessicator—Any convenient form or size.
D 6404 Practice for Sampling of Vegetable Materials Con-
6. Test Specimen
taining Tannin
6.1 The specimen shall consist of 100 mL of a solution
D 6405 Practice for Extraction of Tannins from Raw and
prepared as described in Practices D 4901, D 4905, and
Spent Materials
D 6405.
2.2 ALCA Methods:
A20 Total Solids and Water
7. Procedure
7.1 Thoroughly mix the solution, prepared as described in
This test method is under the jurisdiction ofASTM Committee D31 on Leather
Practices D 4901, D 4905, and D 6405, by inverting and
and is the direct responsibility of Subcommittee D31.01 on Vegetable Leather. This
shaking 8 to 10 times, taking care to ensure that all insoluble
test method has been adapted from and is a replacement for Method A20 of the
Official Methods of the American Leather Chemists Association. matter is uniformly dispersed and none left adhering to the
Current edition approved April 1, 2004. Published May 2004. Originally
walls of the flask. Immediately, pour a 150-mL to 250-mL
approved in 1989. Last previous edition approved in 1999 as D 4903–99.
portion (approximately) into a bottle or other suitable con-
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
tainer, stoppered or covered, and retain until the soluble solids
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on
and non-tannins are ready to be pipetted (see Practice D 6404).
the ASTM website.
Where the analysis is being performed in a constant tempera-
Official Methods of the American Leather Chemists Association. Available
ture room, however, the specimen may be pipetted from this
from the American Leather Chemists Association, University of Cincinnati, P.O.
portion at any convenient time.At the proper time, thoroughly
Box 210014, Cincinnati, OH 4522
...
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