ASTM D3444-00(2020)

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: D3444 −00 (Reapproved 2020)
Standard Test Method for
Total Acid Number of Trichlorotrifluoroethane
This standard is issued under the fixed designation D3444; 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 4.2 Vinyl Tubing.
1.1 This test method covers the determination of total 4.3 Two Indicating Carbon Dioxide Absorbent Tubes, 30–50
acidity in trichlorotrifluoroethane and other halocarbons that mesh.
are liquid at room temperature.
5. Reagents
1.2 The values stated in SI units are to be regarded as
5.1 Purity of Reagents—Reagent grade chemicals shall be
standard. No other units of measurement are included in this
used in all tests. Unless otherwise indicated, it is intended that
standard.
all reagents shall conform to the specifications of the Commit-
1.3 This standard does not purport to address all of the
tee onAnalytical Reagents of theAmerican Chemical Society,
safety concerns, if any, associated with its use. It is the
where such specifications are available. Other grades may be
responsibility of the user of this standard to establish appro-
used, provided it is first ascertained that the reagent is of
priate safety, health, and environmental practices and deter-
sufficiently high purity to permit its use without lessening the
mine the applicability of regulatory limitations prior to use.
accuracy of the determination.
Specific precautionary statements are given in Section 6.
1.4 This international standard was developed in accor- 5.2 Purity of Water—Unless otherwise indicated, references
towatershallbeunderstoodtomeanhalide-freedistilledwater.
dance with internationally recognized principles on standard-
ization established in the Decision on Principles for the
5.3 Isopropyl Alcohol.
Development of International Standards, Guides and Recom-
5.4 Phenolphthalein Indicator Solution(0.05gin100mLof
mendations issued by the World Trade Organization Technical
isopropyl alcohol).
Barriers to Trade (TBT) Committee.
5.5 Potassium Acid Phthalate, U.S. National Bureau of
2. Summary of Test Method
Standards primary standard. Dry this chemical in a 120 °C
oven for several hours prior to use. Store the dry chemical in a
2.1 The total acidity of the solvent is determined by titration
desiccator.
with standard alcoholic potassium hydroxide solution using
phenolphthalein solution as the indicator. 5.6 Potassium Hydroxide Pellets.
5.7 Potassium Hydroxide Solution in Isopropyl Alcohol
3. Significance and Use
(0.01 N)—Add approximately1gof solid KOH to approxi-
3.1 This test method determines the total acidity of trichlo-
mately 1 Lof anhydrous isopropyl alcohol ina2LErlenmeyer
rotrifluoroethane by titration with alcoholic potassium hydrox-
flask. Boil the mixture gently for 5 to 10 min, stirring to
ide using phenolphthalein for an indicator.
prevent the solids from forming a cake on the bottom. Add at
least 2 g of barium hydroxide [Ba(OH) ] and boil again gently
3.2 This test method can be used to develop production and
for 5 to 10 min. Cool to room temperature. Allow to stand for
purchasing specifications.
several hours and filter the supernatant liquid through a fine
sintered glass or porcelain filtering funnel. Avoid unnecessary
4. Apparatus
exposure to CO during filtration. Store the solution out of
4.1 Buret, 2 mLin 0.01 mLsubdivisions, self-leveling, with
contact with cork or rubber. Protect the solution from CO by
1000 mL reservoir.
Tygon has been found satisfactory. An equivalent may be used.
1 3
This test method is under the jurisdiction of ASTM Committee D26 on Reagent Chemicals, American Chemical Society Specifications, American
Halogenated Organic Solvents and Fire Extinguishing Agents and is the direct Chemical Society, Washington, DC. For suggestions on the testing of reagents not
responsibility of Subcommittee D26.04 on Test Methods. listed by the American Chemical Society, see Analar Standards for Laboratory
Current edition approved Jan. 1, 2020. Published January 2020. Originally Chemicals, BDH Ltd., Poole, Dorset, U.K., and the United States Pharmacopeia
approved in 1975. Last previous edition approved in 2015 as D3444–00(2015). and National Formulary, U.S. Pharmacopeial Convention, Inc. (USPC), Rockville,
DOI: 10.1520/D3444–00R20. MD.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
D3444 − 00 (2020)
a guard tube containing carbon dioxide adsorbent. Standardize 7.4.7 Titrate the standard with the approximate 0.01 N
against pure potassium acid phthalate in about 25 mL of potassium hydroxide solution to the phenolphthalein indicator
CO -free water using phenolphthalein to detect the end point. end point. Record the titer.
8. Calculation
6. Hazards
8.1 Calculate the acid number of the s
...