ASTM D4904-99
(Practice)Standard Practice for Cooling of Analytical Solutions
Standard Practice for Cooling of Analytical Solutions
SCOPE
1.1 This practice is intended for use in the cooling of the analytical solutions, prepared under Methods D4901, D4905, and ALCA Method A5, since the analytical results obtained are to some extent dependent on the conditions of cooling.
1.2 This standard may involve hazardous materials, operations, and equipment. This standard does not purport to address all of the safety problems 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.
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Standards Content (Sample)
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Designation: D 4904 – 99
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-L or 2-L solutions 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 practi
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