ASTM D5194-96(2000)
(Test Method)Standard Test Method for Trace Chloride in Liquid Aromatic Hydrocarbons
Standard Test Method for Trace Chloride in Liquid Aromatic Hydrocarbons
SCOPE
1.1 This test method covers the determination of total chloride (organic and inorganic) in liquid aromatic hydrocarbons and cyclohexane.
1.2 The test method is applicable to samples with chloride concentrations of 1 to 25 mg/kg.
1.3 Bromides and iodides, if present, will be calculated as chlorides.
1.4 Materials, such as styrene, that are polymerized by sodium biphenyl reagent cannot be analyzed by this test method.
1.5 The following applies to all specified limits in this test method: for purposes of determining conformance with this test method, an observed value or a calculated value shall be rounded off "to the nearest unit" in the last right-hand digit used in expressing the specification limit, in accordance with the rounding-off method of Practice E29.
1.6 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 a specific hazard statement, see Section 7.
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Designation:D5194–96 (Reapproved 2000)
Standard Test Method for
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Trace Chloride in Liquid Aromatic Hydrocarbons
This standard is issued under the fixed designation D 5194; 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 D 4052 Test Method for Density and Relative Density of
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Liquids by Digital Density Meter
1.1 This test method covers the determination of total
E29 Practice for Using Significant Digits in Test Data to
chloride (organic and inorganic) in liquid aromatic hydrocar-
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Determine Conformance with Specifications
bons and cyclohexane.
2.2 Other Documents:
1.2 The test method is applicable to samples with chloride
OSHA Regulations, 29 CFR, paragraphs 1910.1000 and
concentrations of 1 to 25 mg/kg.
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1910.1200
1.3 Bromides and iodides, if present, will be calculated as
chlorides.
3. Summary of Test Method
1.4 Materials, such as styrene, that are polymerized by
3.1 A known amount of hydrocarbon sample is transferred
sodium biphenyl reagent cannot be analyzed by this test
into a separatory funnel containing toluene. Sodium biphenyl
method.
reagent is added to convert organic halogens into inorganic
1.5 The following applies to all specified limits in this test
halides. The excess reagent is decomposed with water and the
method: for purposes of determining conformance with this
phases are separated. The aqueous phase is acidified, washed,
test method, an observed value or a calculated value shall be
and concentrated. Acetone is added and the solution is titrated
rounded off “to the nearest unit” in the last right-hand digit
with silver nitrate solution.
used in expressing the specification limit, in accordance with
the rounding-off method of PracticeE29.
4. Significance and Use
1.6 This standard does not purport to address all of the
4.1 Organic and inorganic chlorine compounds can have a
safety concerns, if any, associated with its use. It is the
deleterious effect on equipment and reactions in processes
responsibility of the user of this standard to establish appro-
involving aromatic hydrocarbons.
priate safety and health practices and determine the applica-
4.2 Maximum chloride levels are often specified for process
bility of regulatory limitations prior to use. For a specific
streams and for aromatic hydrocarbon products.
hazard statement, see Section 7.
5. Apparatus
2. Referenced Documents
5.1 Titrator, potentiometric, recording, + 2000 mV range, 1
2.1 ASTM Standards:
mV resolution with dispenser having a volume readout of 0.00
D 891 Test Method for Specific Gravity, Apparent, of Liq-
to 9.99 mL or 0.00 to 99.99 mL and 0.01 % resolution.
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uid Industrial Chemicals
3 5.2 Electrode, glass, reference.
D 1193 Specification for Reagent Water
5.3 Electrode, silver, billet type.
D 3437 Practice for Sampling and Handling Liquid Cyclic
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Products
6. Reagents and Materials
D 3505 Test Method for Density or Relative Density of
6.1 Purity of Reagents—Reagent grade chemicals shall be
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Pure Liquid Chemicals
used in all tests. Unless otherwise indicated, it is intended that
all reagents conform to the specifications of the Committee on
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Analytical Reagents of theAmerican Chemical Society, where
This test method is under the jurisdiction of ASTM Committee D16 on
Aromatic Hydrocarbons and Related Chemicals and is the direct responsibility of
Subcommittee D16.04 on Instrumental Analysis.
Current edition approved Feb. 10, 1996. Published April 1996. Originally
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published as D 5194 – 91. Last previous edition D 5194 – 91 . Annual Book of ASTM Standards, Vol 05.02.
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Annual Book of ASTM Standards, Vol 15.05. Annual Book of ASTM Standards, Vol 14.02.
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Annual Book of ASTM Standards, Vol 11.01. Available from Superintendent of Documents, U.S. Government Printing
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Annual Book of ASTM Standards, Vol 06.04. Office, Washington, DC 20402.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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D5194–96 (2000)
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such specifications are available. Other grades may be used, 9. Electrode Preparation
provided it is first ascertained that the reagent is of sufficiently
9.1 Clean the surface of the silver electrode with mild
high purity to permit its use without lessening the accuracy of
detergent and scouring powder, and rinse with water.
the determination.
9.2 Immerse the electrode in the saturated potassium chlo-
6.2 Purity of Water—Unless otherwise indicated, references
ride solution until the electrode tip turns light gray.
to water shall be understood to mean reagent water as defined
9.3 Rin
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