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ASTM

ASTM D4902-99

(Practice)

Standard Practice for Evaporation and Drying of Analytical Solutions

Standard Practice for Evaporation and Drying of Analytical Solutions

SCOPE
1.1 This practice is intended for use in evaporating and drying the 100 mL portions of analytical solution, obtained in Methods D4903 and ALCA A21 and A22 so that consistent results may be obtained for the determination of total solids, soluble solids, and non-tannins in the sample. It is also intended for use in determining the moisture in the air-dry and prepared, wet, hide powders used in ALCA Method A22, and the moisture in raw and spent materials (ALCA Method A6).

General Information

Status
Historical
Publication Date
09-May-1999
ICS
59.140.10 - Processes and auxiliary materials
Technical Committee
D31 - Leather
Drafting Committee
D31.01 - Vegetable Leather
Current Stage
Ref Project

Relations

Replaced By
ASTM D4902-99(2004) - Standard Test Method for Evaporation and Drying of Analytical Solutions
Effective Date
01-Apr-2004
Referred By
ASTM D6407-99(2020) - Standard Test Method for Analysis of Iron and Copper in Vegetable Tanning Materials
Effective Date
10-May-1999
Referred By
ASTM D4899-99(2020) - Standard Practice for Analysis of Vegetable Tanning Materials—General
Effective Date
10-May-1999
Referred By
ASTM D6402-99(2020) - Standard Test Method for Determining Soluble Solids and Insolubles in Extracts of Vegetable Tanning Materials
Effective Date
10-May-1999
Referred By
ASTM D4903-99(2020) - Standard Test Method for Total Solids and Water in Vegetable Tanning Material Extracts
Effective Date
10-May-1999
Referred By
ASTM D6401-99(2020) - Standard Test Method for Determining Non-Tannins and Tannin in Extracts of Vegetable Tanning Materials
Effective Date
10-May-1999

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ASTM D4902-99 - Standard Practice for Evaporation and Drying of Analytical Solutions
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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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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: D 4902 – 99
Standard Test Method for
Evaporation and Drying of Analytical Solutions
This standard is issued under the fixed designation D 4902; 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 test method is also intended for use in determining the moisture
in the air-dry and prepared, wet, hide powders used in Test
1.1 This test method covers a procedure for the evaporating
Method D 6401 and the moisture in raw and spent materials in
and drying of the 100 mL portions of analytical solution,
Test Method D 6403.
obtained in the methods for vegetable tannin analysis, so that
consistent results may be obtained for the determination of
4. Significance and Use
total solids, soluble solids, and non-tannins in the sample. This
4.1 The test method is useful for determining the solid
test method is also intended for use in determining the moisture
residue in analytical solutions.
in the hide powder samples and the moisture in raw and spent
4.2 Because of the possibility of unknown errors in this test
materials in the methods for vegetable tannin analysis.
method, it is essential that the procedure be followed exactly in
2. Referenced Documents order to obtain reproducible results both among specimens
within a laboratory and for analyses between laboratories.
2.1 ASTM Standards:
D 4903 Test Method for Total Solids and Water in Vegetable
5. Apparatus
Tanning Material Extracts
5.1 Drying Oven—Forced-air convection oven (or
D 6401 Test Method for Determining Non-Tannins and
2 mechanical-convection draft oven) capable of maintaining a
Tannin in Extracts of Vegetable Tanning Materials
temperature of 100° 6 2.0°C.
D 6402 Test Method for Determining Soluble Solids and
2 5.2 Thermometer—Accurate to 6 0.2°C, should be used to
Insolubles in Extracts of Vegetable Tanning Materials
check and monitor the oven set point.
D 6403 Test Method for Determining Moisture in Raw and
2 5.3 Desiccators and Desiccant:
Spent Materials
5.3.1 The desiccators used can be of any convenient form or
2.2 ALCA Methods:
3 size, but be at least 4 in. in diameter for a single tannin dish.
A13 Evaporation and Drying of Analytical Solutions
5.3.2 Any normal desiccating agent such as calcium sulfate,
3. Summary of Test Method calcium chloride, or silica gel may be used.
3.1 This test method describes a procedure for evaporation
6. Procedure
and drying of the 100 mL portions of the analytical solution
6.1 The thermometer having been checked and the oven
obtai
...

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