ASTM D2784-98
(Test Method)Standard Test Method for Sulfur in Liquefied Petroleum Gases (Oxy-Hydrogen Burner or Lamp)
Standard Test Method for Sulfur in Liquefied Petroleum Gases (Oxy-Hydrogen Burner or Lamp)
SCOPE
1.1 This test method covers the determination of total sulfur in liquified petroleum gases containing more than 1 [mu]g/g. Specimens should not contain more than 100 [mu]g/g of halogens.
1.2 To attain the quantitative detectability that the method is capable of, stringent techniques must be employed and all possible sources of sulfur contamination must be eliminated. In particular, cleaning agents, such as common household detergents which contain sulfates, should be avoided.
1.3 The values given in acceptable metric units are to be regarded as the standard.
1.4 This standard does not purport to address all of the safety problems, 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.
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Standards Content (Sample)
NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
An American National Standard
Designation: D 2784 – 98
Standard Test Method for
Sulfur in Liquefied Petroleum Gases (Oxy-Hydrogen Burner
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or Lamp)
This standard is issued under the fixed designation D 2784; 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 3. Summary of Test Method
1.1 This test method covers the determination of total sulfur 3.1 The sample is burned in an oxy-hydrogen burner, or in
in liquified petroleum gases containing more than 1 μg/g. a lamp in a closed system in a carbon dioxide-oxygen
Specimens should not contain more than 100 μg/g of halogens. atmosphere. The latter is not recommended for trace quantities
1.2 To attain the quantitative detectability that the method is of sulfur due to the inordinately long combustion times needed.
capable of, stringent techniques must be employed and all The oxides of sulfur are absorbed and oxidized to sulfuric acid
possible sources of sulfur contamination must be eliminated. In in a hydrogen peroxide solution. The sulfate ions are then
particular, cleaning agents, such as common household deter- determined by either of the following finishes:
gents which contain sulfates, should be avoided. 3.1.1 Barium Perchlorate Titration—The sulfate is titrated
1.3 The values given in acceptable metric units are to be with barium perchlorate using a thorin-methylene blue mixed
regarded as the standard. indicator.
1.4 This standard does not purport to address all of the 3.1.2 Turbidimetric—The sulfate is precipitated as barium
safety concerns, if any, associated with its use. It is the sulfate and the turbidity of a suspension of the precipitate is
responsibility of the user of this standard to establish appro- measured with a photometer.
priate safety and health practices and determine the applica-
4. Significance and Use
bility of regulatory limitations prior to use.
4.1 It is important to have the sulfur content of liquefied
2. Referenced Documents
petroleum gases at low enough concentration to meet govern-
2.1 ASTM Standards: ment regulations. The presence of sulfur can result in corrosion
D 156 Test Method for Saybolt Color of Petroleum Prod- of metal surfaces. Sulfur can be poisonous to catalysts in
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ucts (Saybolt Chromometer Method) subsequent processing.
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D 1193 Specification for Reagent Water
5. Apparatus
D 1265 Practice for Sampling Liquefied Petroleum (LP)
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Gases 5.1 Oxy-Hydrogen Combustion Assembly— The two types
listed below are recommended. Any combustion apparatus
D 1266 Test Method for Sulfur in Petroleum Products
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(Lamp Method) giving equivalent results, however, is satisfactory.
D 1657 Test Method for Density or Relative Density of 5.1.1 Wickbold-Type Combustion Apparatus, as shown in
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Fig. 1.
Light Hydrocarbons by Pressure Thermohydrometer
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E 11 Specification for Wire-Cloth Sieves for Testing Pur- 5.1.2 Modified Beckman Burner-Type Apparatus, as shown
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in Fig. 2. Each of the above types of apparatus shall consist of
poses
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2.2 Institute of Petroleum Standard: three parts: atomizer-burner, combustion chamber, and ab-
sorber with spray trap. A blowout safety port in the combustion
IP 181 Sampling Petroleum Gases, Including Liquefied
Petroleum Gases chamber is desirable. The remainder of the apparatus shall
consist of a suitable support stand with the necessary needle
valves and flow meters for precise control of oxygen, hydro-
gen, and vacuum.
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This test method is under the jurisdiction of ASTM Committee D-2 on
5.1.3 Safety Shield—A transparent shield shall be used to
Petroleum Products and Lubricants and is the direct responsibility of Subcommittee
D02.03 on Elemental Analysis. protect the operator in the event an explosive mixture is formed
Current edition approved Feb. 10, 1998. Published June 1998. Originally
in the combustion chamber.
published as D 2784 – 69 T. Last previous edition D 2784 – 92.
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Annual Book of ASTM Standards, Vol 05.01.
3
Annual Book of ASTM Standards, Vol 11.01.
4
Annual Book of ASTM Standards, Vol 14.02.
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Available from American National Standards Institute, 11 W. 42nd St., 13th Available from Scientific Glassblowing Co., P.O. Box 18353, Houston, TX
Floor, New York, NY 10036. 77023.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
D2784–98
5.6 Carbon Dioxide Pressure Regulator— This regulator
should be of
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