ASTM D1821-95
(Test Method)Standard Test Method for Inorganic Chlorides in Askarels (Withdrawn 2000)
Standard Test Method for Inorganic Chlorides in Askarels (Withdrawn 2000)
SCOPE
1.1 This test method covers the determination of inorganic chloride ions in askarels, in the range 0.02 to 100 ppm.
1.2 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 establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. Specific precautionary statements are given in 8.2.
General Information
Standards Content (Sample)
NOTICE: This standard has either been superseded and replaced by a new version or
withdrawn. Contact ASTM International (www.astm.org) for the latest information.
Designation: D 1821 – 95
AMERICAN SOCIETY FOR TESTING AND MATERIALS
100 Barr Harbor Dr., West Conshohocken, PA 19428
Reprinted from the Annual Book of ASTM Standards. Copyright ASTM
Standard Test Method for
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Inorganic Chlorides in Askarels
This standard is issued under the fixed designation D 1821; 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 6.2 Electrode System for Titrimeter—The most satisfactory
electrode system, with respect to length of life and ease of
1.1 This test method covers the determination of inorganic
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maintenance, is a silver-glass system. Other electrodes that
chloride ions in askarels, in the range 0.02 to 100 ppm.
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have given satisfactory results are silver-silver chloride and
1.2 This standard does not purport to address all of the
silver (wire or billet)-mercurous sulfate, prepared as follows:
safety concerns, if any, associated with its use. It is the
6.2.1 Dismantle the internal element from the salt bridge
responsibility of the user of this standard to establish appro-
tube of a standard calomel reference electrode. Discard the
priate safety and health practices and determine the applica-
saturated potassium chloride (KCl) solution from the tube, and
bility of regulatory limitations prior to use. Specific precau-
clean out the mercurous chloride (Hg Cl ) and mercury from
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tionary statements are given in 8.2.
the internal element. Clean the parts thoroughly. Add sufficient
new clean mercury to the internal element to make contact with
2. Referenced Documents
electrode wire, and repack the chamber of the internal element
2.1 ASTM Standards:
2 with mercurous sulfate (Hg SO ) moistened with 0.5 M
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D 1193 Specification for Reagent Water
potassium sulfate (K SO ) solution. Seal the chamber with
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nonabsorbent cotton. Fill the salt bridge tube with 0.5 M
3. Summary of Test Method
K SO solution and reassemble the units.
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3.1 Chloride ion is determined by potentiometric titration in
6.2.2 The life of the silver-mercurous sulfate electrode is
an essentially nonaqueous medium.
limited. It should be repacked when the mercurous sulfate turns
from white to brown.
4. Significance and Use
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6.3 Buret—Microburet, 1.0-mL capacity.
4.1 In the presence of water, chlorides can ionize. Their
6.4 Magnetic Stirrer, with glass-covered or TFE-
corrosive action can then be detrimental to the life of the
fluorocarbon-coated stirring bar.
apparatus in which the askarel is used.
4.2 Many askarels contain polychlorinated biphenyls
7. Reagents and Materials
(PCBs). Manufacture and sale of PCBs has been prohibited by
7.1 Purity of Reagents—Use reagent grade chemicals in all
Federal regulation in the United States since 1978. The
tests. Unless otherwise indicated, it is intended that all reagents
conditions for continued use and the handling and disposal of
shall conform to the specifications of the Committee on
PCBs are also regulated. Users of this and other methods of
Analytical Reagents of the American Chemical Society, where
measuring the properties of askarels containing PCBs are
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such specifications are available. Other grades may be used,
responsible for following applicable Federal, state, and local
provided it is first ascertained that the reagent is of sufficiently
regulations.
high purity to permit its use without lessening the accuracy of
the determination.
5. Interferences
7.2 Purity of Water—Use reagent grade water conforming
5.1 Other halogens interfere but will not normally be
to Specification D 1193, unless otherwise specified. In addi-
encountered in making this test.
tion, the water shall be chloride-free, as detected by this test.
7.3 Acetone, containing no titratable chloride.
6. Apparatus
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6.1 Electrometric Titrimeter.
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Beckman silver billet electrode No. 39261 and glass electrode No. 40498 have
been found satisfactory for this purpose.
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This test method is under the jurisdiction of ASTM Committee D-27 on Obtainable from Fisher Scientific Co.
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Electrical Insulating Liquids and Gasesand is the direct responsibility of Subcom- Fisher Catalog No. 20-110 and Scientific Glass Apparatus Co. No. JM-570
mittee D27.06 on Chemical Test. burets have been found satisfactory for this purpose.
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Current edition approved June 15, 1995. Published August 1995. Originally “Reagent Chemicals, American Chemical Society Specifications,” Am. Chemi-
published as D 1821 – 60 T. Last previous edition D 1821 – 84 (1989). cal Soc., Washington, DC. For suggestions on the testing of reagents not listed by
2
Annual Book of ASTM Standards, Vol 10.01. the American Chemical Society, see “Reagen
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