ASTM D3443-00(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: D3443 −00 (Reapproved 2020)
Standard Test Method for
Chloride in Trichlorotrifluoroethane
This standard is issued under the fixed designation D3443; 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.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope 5. Reagents
1.1 This test method covers the determination of chloride in
5.1 Purity of Reagents—Reagent grade chemicals shall be
trichlorotrifluoroethane and other halocarbons that are liquid at
used in all tests. Unless otherwise indicated, it is intended that
room temperature.
all reagents shall conform to the specifications of the Commit-
tee onAnalytical Reagents of theAmerican Chemical Society,
1.2 The values stated in SI units are to be regarded as
where such specifications are available. Other grades may be
standard. No other units of measurement are included in this
used, provided it is first ascertained that the reagent is of
standard.
sufficiently high purity to permit its use without lessening the
1.3 This standard does not purport to address all of the
accuracy of the determination.
safety concerns, if any, associated with its use. It is the
5.2 Purity of Water—Unless otherwise indicated, references
responsibility of the user of this standard to establish appro-
towatershallbeunderstoodtomeanhalide-freedistilledwater.
priate safety, health, and environmental practices and deter-
mine the applicability of regulatory limitations prior to use.
5.3 s-Diphenylcarbazone Solution—Dissolve 0.5 g of
1.4 This international standard was developed in accor-
s-diphenylcarbazone, in 100 mL of methanol.
dance with internationally recognized principles on standard-
5.4 Silver Nitrate Solution—Dissolve 8.5 g of silver nitrate
ization established in the Decision on Principles for the
(AgNO ) in 500 mL of water.
Development of International Standards, Guides and Recom- 3
mendations issued by the World Trade Organization Technical
5.5 Standard Mercuric Acetate Solution—Dilute 40 mL of
Barriers to Trade (TBT) Committee.
stock mercuric acetate solution, reagent 2, to 1000 mL and
adjust the pH to 1.6 with nitric acid. Standardize as follows:
2. Summary of Test Method
5.5.1 Pipet 10.00 mL of standard sodium chloride solution
2.1 This test method is based on the determination of
into a 250 mL Erlenmeyer flask. Add 20 mL of chloride-free
ionizable chloride by titration with mercuric acetate solution
waterand5dropsof s-diphenylcarbazonesolution.Titratewith
using s-diphenylcarbazone as the indicator.
standard mercuric acetate solution to the faint purple end point.
Then:
3. Significance and Use
mL NaCl 31.000
5 F 5µg Cl/mL (1)
3.1 This test method determines ionizable chloride that can
mL mercuric acetate
be aqueously extracted from trichlorotrifluoroethane.
where
3.2 This test method can be used to establish production and
F = factor for the mercuric acetate solution (see 7.1).
purchasing specifications.
5.6 Standard Sodium Chloride Solution—Dissolve 0.0660 g
4. Apparatus
of sodium chloride in water and dilute to 1000 mL. Pipet
25 mL of this solution into a 1000-mL volumetric flask, dilute
4.1 Separatory Funnels, two 250 mL, with polytetra-
to volume, and mix. One millilitre of this solution contains
fluoroethylene stopcocks.
1.00 µg of chloride ion.
4.2 Erlenmeyer Flask, 125 mL.
1 2
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. li
...