ASTM D3448-10(2020)
(Test Method)Standard Test Method for Specific Aqueous Conductance of Trichlorotrifluoroethane
Standard Test Method for Specific Aqueous Conductance of Trichlorotrifluoroethane
SIGNIFICANCE AND USE
3.1 This test method allows for the determination of ionizable contaminants (expressed in terms of ppb of HCl) in trichlorotrifluoroethane via measurement of specific aqueous conductance.
3.2 This test method can be used for establishing manufacturing and purchasing specifications.
SCOPE
1.1 This test method covers the determination of aqueous conductivity due to ionizable contaminants extracted from trichlorotrifluoroethane. The value of 1.9 μS/cm as maximum specific aqueous conductance corresponds to 0.1 ppm of chloride ion (100 ppb). It was calculated by putting the solvent specification of 0.1 ppm chloride into the equation of the subject method to find C2 − C1 equals 19.08. The specific conductance due to contaminants from the solvent was then calculated as follows:
1.2 The above is exclusive of the background specific conductance of the water used in the analysis.
1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.3.1 Exception—Values are stated in inch-pound units in Fig. 1.
1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to consult and establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. Specific precautionary statements are given in Section 6.
1.5 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.
General Information
Relations
Standards Content (Sample)
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: D3448 −10 (Reapproved 2020)
Standard Test Method for
1
Specific Aqueous Conductance of Trichlorotrifluoroethane
This standard is issued under the fixed designation D3448; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope 3. Significance and Use
1.1 This test method covers the determination of aqueous 3.1 This test method allows for the determination of ioniz-
conductivity due to ionizable contaminants extracted from able contaminants (expressed in terms of ppb of HCl) in
trichlorotrifluoroethane. The value of 1.9 µS/cm as maximum trichlorotrifluoroethane via measurement of specific aqueous
specific aqueous conductance corresponds to 0.1 ppm of conductance.
chlorideion(100ppb).Itwascalculatedbyputtingthesolvent
3.2 This test method can be used for establishing manufac-
specification of 0.1 ppm chloride into the equation of the
turing and purchasing specifications.
subject method to find C − C equals 19.08. The specific
2 1
conductance due to contaminants from the solvent was then 4. Apparatus
calculated as follows:
2
4.1 Conductivity Bridge.
~C 2 C !C 5 ~19!~0.1! 51.9 µS/cm (1) 3
2 1 3
4.2 Conductivity Cell, dip-type. Cell constant of 0.1 recip-
1.2 The above is exclusive of the background specific rocal centimetre. Electrodes must be bright platinum.
conductance of the water used in the analysis.
4.3 Polyethylene Beaker, 250 mL.
1.3 The values stated in SI units are to be regarded as
4.4 Polyethylene Bottles, wide mouth, 300 mLand 500 mL
standard. No other units of measurement are included in this
size.
standard.
4.4.1 Calibrate and mark the outside of the 300 mL poly-
1.3.1 Exception—Values are stated in inch-pound units in
ethylene bottles to indicate 20 mL, 120 mL, and 220 mL
Fig. 1.
(graduate) of water volume, using deionized water to deter-
1.4 This standard does not purport to address all of the
mine the liquid levels.
safety concerns, if any, associated with its use. It is the
4.5 Polyethylene Tubing, long enough to reach the bottom
responsibility of the user of this standard to consult and
of the 300 mL polyethylene bottle.
establish appropriate safety, health, and environmental prac-
tices and determine the applicability of regulatory limitations
5. Reagents
prior to use. Specific precautionary statements are given in
5.1 Purity of Reagents—Reagent grade chemicals shall be
Section 6.
used in all tests. Unless otherwise indicated, it is intended that
1.5 This international standard was developed in accor-
all reagents shall conform to the specifications of the Commit-
dance with internationally recognized principles on standard-
tee onAnalytical Reagents of theAmerican Chemical Society,
ization established in the Decision on Principles for the
4
where such specifications are available. Other grades may be
Development of International Standards, Guides and Recom-
mendations issued by the World Trade Organization Technical
2
The sole source of supply of the apparatus (Serfass Model RCM-15B1) known
Barriers to Trade (TBT) Committee.
to the committee at this time is Industrial Instrument Inc., Cedar Grove, NJ. If you
are aware of alternative suppliers, please provide this information to ASTM
2. Summary of Test Method
International Headquarters. Your comments will receive careful consideration at a
1
meeting of the responsible technical committee, which you may attend.
2.1 Ionizable impurities in the solvent are extracted with
3
The sole source of supply of the apparatus (Model Cel-A01) known to the
water of known low conductivity. The increase in water
committee at this time is Industrial Instrument Inc., Cedar Grove, NJ. If you are
conductivity measures the amount of these impurities present.
aware of alternative suppliers, please provide this information to ASTM Interna-
tional Headquarters.Your comments will receive careful consideration at a meeting
1
of the responsible technical committee, which you may attend.
1 4
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 April 1, 2020. Published April 2020. Originally Chemicals, BDH Ltd., Poole,
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