ASTM D1318-00
(Test Method)Standard Test Method for Sodium in Residual Fuel Oil (Flame Photometric Method)
Standard Test Method for Sodium in Residual Fuel Oil (Flame Photometric Method)
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An American National Standard
Designation:D1318–00
Standard Test Method for
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Sodium in Residual Fuel Oil (Flame Photometric Method)
This standard is issued under the fixed designation D 1318; 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 5. Apparatus
1.1 This test method covers the determination of sodium in 5.1 Flame Photometer, capable of isolating the sodium
residual fuel oil by means of a flame photometer. Its precision doublet at 589 nm and stable enough to give repeatable
in low ranges limits its application to samples containing more measurements that do not vary more than 5 % of their mean in
than 15 mg/kg sodium. Other elements commonly found in the 2 to 20 mg/kg range of sodium.
residual fuel oil do not interfere. 5.2 Platinum Dish, 100-mL capacity, approximately 35 mm
1.2 The values stated in SI units are to be regarded as the in depth.
standard. 5.3 Electric Muffle Furnace, capable of operating over a
1.3 This standard does not purport to address all of the variable range from 200 to 600°C and of maintaining a
safety problems associated with its use. It is the responsibility temperature of 550 6 50°C.
of the user of this standard to establish appropriate safety and
6. Reagents and Materials
health practices and determine the applicability of regulatory
6.1 Purity of Reagents—Reagent grade chemicals shall be
limitations prior to use. For specific hazard statements see 6.3,
6.5, 6.7, 8.2, and Note 3. used in all tests. Unless otherwise indicated, it is intended that
all reagents shall conform to the specifications of the Commit-
2. Referenced Documents
tee onAnalytical Reagents of theAmerican Chemical Society,
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2.1 ASTM Standards: where such specifications are available. Other grades can be
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D 1193 Specification for Reagent Water used, provided it is first ascertained that the reagent is of
D 4057 Practice for Manual Sampling of Petroleum and sufficiently high purity to permit its use without lessening the
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Petroleum Products accuracy of the determination.
D 4177 Practice for Automatic Sampling of Petroleum and 6.2 Purity of Water—Unless otherwise indicated, references
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Petroleum Products to water shall be understood to mean reagent water as defined
by Type II or III of Specification D 1193.
3. Summary of Test Method
6.3 Hydrochloric Acid (sp gr 1.19)—Concentrated hydro-
3.1 A weighed sample is reduced to a carbonaceous ash
chloric acid (HCl). (Warning—Poison. Causes severe burns.
undercontrolledconditions.Theresidualcarbonisremovedby Harmful or fatal if swallowed or inhaled.)
heating in a muffle furnace at 550°C. The ash is dissolved,
6.4 Hydrochloric Acid (1+9)—Mix 1 volume of HCl (sp gr
diluted to volume, and the sodium determined by means of a 1.19) with 9 volumes of water.
flame photometer.
6.5 Hydrofluoric Acid (48 %)—Concentrated hydrofluoric
acid (HF). (Warning—Poison. Causes severe burns. Harmful
4. Significance and Use
or fatal if swallowed or inhaled.)
4.1 Excessive amounts of sodium can indicate the presence
6.6 Sodium Solution, Standard (1000 mg Na/L)—Dissolve
of materials that cause high wear of burner pumps and valves,
3.088 60.005gofdriedsodiumsulfate(Na SO )inwaterand
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and contribute to deposits of boiler heating surfaces.
dilute to 1 L in a volumetric flask. Store in a polyethylene
bottle.
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This test method is under the jurisdiction of ASTM Committee D02 on
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Petroleum Products and Lubricants and is the direct responsibility of Subcommittee Reagent Chemicals, American Chemical Society Specifications, American
D02.03 on Elemental Analysis. Chemical Society, Washington, DC. For suggestions on the testing of reagents not
Current edition approved Apr. 10, 2000. Published June 2000. Originally listed by the American Chemical Society, see Analar Standards for Laboratory
published as D 1318 – 54T. Discontinued August 1992. Reinstated as D 1318–00. Chemicals, BDH Ltd., Poole, Dorset, U.K., and the United States Pharmacopeia
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Annual Book of ASTM Standards, Vol 11.01. and National Formulary, U.S. Pharmacopeial Convention, Inc. (USPC), Rockville,
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Annual Book of ASTM Standards, Vol 05.02. MD.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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D1318–00
6.7 Sulfuric Acid (1+1) —Carefully add, while stirring, 1 the initial and final weights of the sample bottle. Place the
volume of concentrated sulfuric acid (H SO , sp gr 1.84) to 1 platinum dish containing the fuel oil on a silica triangle
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volume of water. (Warning—Poison. Causes severe burns. prope
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