ASTM D2522-03

Standard Test Method for Chlorine Content of Polybutenes Used for Electrical Insulation

SIGNIFICANCE AND USE
Chlorine is normally present in polybutenes in small amounts, usually below 50 ppm, as organically bound chlorine. Inorganic chloride is normally not present.
Note 1—The qualitative presence or absence of inorganic chloride may be tested by Test Method D 878.
SCOPE
1.1 This test method describes the determination of the total chloride content of polybutenes used for electrical insulation.
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. For specific hazards information, see Section 8.

General Information

• Status: Historical
• Publication Date: 09-Apr-2003
• ICS: 29.035.20 - Plastics and rubber insulating materials
• Technical Committee: D27 - Electrical Insulating Liquids and Gases
• Drafting Committee: D27.06 - Chemical Test

Relations

• Replaces: ASTM D2522-95 - Standard Test Method for Chlorine Content of Polybutenes Used for Electrical Insulation
• Effective Date: 10-Apr-2003
• Replaced By: ASTM D2522-03(2008) - Standard Test Method for Chlorine Content of Polybutenes Used for Electrical Insulation
• Effective Date: 01-May-2008

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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 2522–03
Standard Test Method for
Chlorine Content of Polybutenes Used for Electrical
1
Insulation
This standard is issued under the fixed designation D 2522; 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. Apparatus
6.1 Separatory Funnel, 250-mL.
1.1 This test method describes the determination of the total
chloride content of polybutenes used for electrical insulation. 6.2 Potentiometeric Titrimeter, automatic recording, or
1.2 This standard does not purport to address all of the manual.
safety concerns, if any, associated with its use. It is the 6.3 Electrodes:
responsibility of the user of this standard to establish appro- 6.3.1 Silver and glass electrode combination is preferred.
priate safety and health practices and determine the applica- 6.3.2 A silver electrode with a mercurous sulfate reference
bility of regulatory limitations prior to use.Forspecifichazards electrode is an acceptable alternative.
information, see Section 8. 6.4 Microburet, 5-mL, with 0.01-mL divisions.
2. Referenced Documents 7. Reagents
2.1 ASTM Standards: 7.1 Purity of Reagents—Use reagent grade chemicals in all
D 878 Test Method for Inorganic Chlorides and Sulfates in tests. Unless otherwise indicated, it is intended that all reagents
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Insulating Oils shall conform to the specifications of the Committee on
3
D 1193 Specification for Reagent Water Analytical Reagents of theAmerican Chemical Society, where
4
D 2296 Specification for Continuity of Quality of Electrical such specifications are available. Other grades may be used,
2
Insulating Polybutene Oil for Capacitors provided it is first ascertained that the reagent is of sufficiently
high purity to permit its use without lessening the accuracy of
3. Summary of Test Method
the determination.
3.1 Organically bound chlorine is converted into sodium
7.2 Purity of Water— Unless otherwise indicated, refer-
chloride by reaction with sodium biphenyl solution. The encestowatershallbeunderstoodtomeanreagentgradewater
sodium chloride formed is extracted with dilute nitric acid, and as defined by Type I conforming to Specifications D 1193.
the chlorine content of the aqueous phase is determined by
7.3 Dilute Nitric Acid (2.1 M)—Dilute 134 mL of concen-
potentiometric titration. trated nitric acid to 1.0 L with water.
7.4 Isopropyl Alcohol.
4. Significance and Use
7.5 Silver Nitrate, Standard Solution (0.025 N)—Weigh
4.1 Chlorine is normally present in polybutenes in small
accurately 0.4247 g of silver nitrate (AgNO ). Transfer it to a
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amounts,usuallybelow50ppm,asorganicallyboundchlorine.
1-L volumetric flask and add water to dissolve.Add 3.0 mL of
Inorganic chloride is normally not present.
concentrated nitric acid (HNO , relative density (specific
3
gravity) 1.42) and then add water to the 1-L mark of the
NOTE 1—Thequalitativepresenceorabsenceofinorganicchloridemay
volumetric flask. Standardize this solution against a pure
be tested by Test Method D 878.
chloridestandard.Checkthesolutionatleastmonthlytoassure
5. Interferences
a constant reagent.
7.6 Sodium Chloride, NIST Standard Reference Material
5.1 The presence of substances which form insoluble silver
919A.
compounds, such as sulfides, will give high results. Such
substances are not normally present in polybutenes.
NOTE 2—Dry the silver nitrate overnight in a desiccator before making
1
This test method is under the jurisdiction of ASTM Committee D27 on
4
Electrical Insulating Liquids and Gases and is the direct responsibility of Subcom- Reagent Chemicals, American Chemical Society Specifications, American
mittee D27.06on Chemical Test. Chemical Society, Washington, DC. For suggestions on the testing of reagents not
Current edition approved April 10, 2003. Published June 2003. Originally listed by the American Chemical Society, see Analar Standards for Laboratory
approved in 1969. Last previous edition approved in 1995 as D 2522 – 95. Chemicals, BDH Ltd., Poole, Dorset, U.K., and the United States Pharmacopeia
2
Annual Book of ASTM Standards, Vol 10.03. and National Formulary, U.S. Pharmacopeial Convention, Inc. (USPC), Rockville,
3
Annual Book of ASTM Standards, Vol 11.01. MD.
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D 2522–03
up the solution. Both the solid material and the solution must be protected
ommended for removal of the sulfur compounds: Charge the
from light by storage in brown glassware in the dark.
aqueous phase from 9.4 to a separatory funnel and add 15 mL
of et
...