ASTM D3443-00

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation: D 3443 – 00
Standard Test Method for
Chloride in Trichlorotrifluoroethane
This standard is issued under the fixed designation D 3443; 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.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope used, provided it is first ascertained that the reagent is of
sufficiently high purity to permit its use without lessening the
1.1 This test method covers the determination of chloride in
accuracy of the determination.
trichlorotrifluoroethane and other halocarbons that are liquid at
5.2 Purity of Water—Unless otherwise indicated, references
room temperature.
towatershallbeunderstoodtomeanhalide-freedistilledwater.
1.2 This standard does not purport to address all of the
5.3 s-Diphenylcarbazone Solution—Dissolve 0.5 g of
safety concerns, if any, associated with its use. It is the
s-diphenylcarbazone, in 100 mL of methanol.
responsibility of the user of this standard to establish appro-
5.4 Silver Nitrate Solution—Dissolve 8.5 g of silver nitrate
priate safety and health practices and determine the applica-
(AgNO ) in 500 mL of water.
bility of regulatory limitations prior to use.
5.5 Standard Mercuric Acetate Solution—Dilute 40 mL of
2. Summary of Test Method
stock mercuric acetate solution, reagent 2, to 1000 mL and
adjust the pH to 1.6 with nitric acid. Standardize as follows:
2.1 This test method is based on the determination of
5.5.1 Pipet 10.00 mL of standard sodium chloride solution
ionizable chloride by titration with mercuric acetate solution
into a 250-mL Erlenmeyer flask. Add 20 mL of chloride-free
using s-diphenylcarbazone as the indicator.
waterand5dropsof s-diphenylcarbazonesolution.Titratewith
3. Significance and Use
standard mercuric acetate solution to the faint purple end point.
Then:
3.1 This test method determines ionizable chloride that can
be aqueously extracted from trichlorotrifluoroethane.
mL NaCl 3 1.000
5 F 5 µg Cl/mL (1)
3.2 This test method can be used to establish production and mL mercuric acetate
purchasing specifications.
where
4. Apparatus F = factor for the mercuric acetate solution (see 7.1).
5.6 Standard Sodium Chloride Solution—Dissolve 0.0660 g
4.1 Separatory Funnels, two 250-mL, with polytetra-
of sodium chloride in water and dilute to 1000 mL. Pipet 25
fluoroethylene stopcocks.
mL of this solution into a 1000-mL volumetric flask, dilute to
4.2 Erlenmeyer Flask, 125-mL.
volume, and mix. One millilitre of this solution contains 1.00
5. Reagents µg of chloride ion.
5.7 Stock Mercuric Acetate Solution—Dissolve 1.6 g of
5.1 Purity of Reagents—Reagent grade chemicals shall be
mercuricacetatein500mLofwatercontaining3.5mLofnitric
used in all tests. Unless otherwise indicated, it is intended that
acid. Dilute to 1000 mL and mix.
all reagents shall conform to the specifications of the Commit-
tee onAnalytical Reagents of theAmerican Chemical Society,
6. Procedure
where such specifications are available. Other grades may be
6.1 Wash all glassware with chloride-free water until 10 mL
of the washings show no trace of turbidity when 1 mLof silver
nitrate solution is added.
This test method is under the jurisdiction of ASTM Committee D-26 on
Halogenated Organic Solvents and Fire Extinguishing Agents and is the direct
6.2 Transfer
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