ASTM D5056-02

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An American National Standard
Designation:D5056–02
Standard Test Method for
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Trace Metals in Petroleum Coke by Atomic Absorption
This standard is issued under the fixed designation D 5056; 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.
TABLE 1 Applicable Concentration Ranges and Limits of
1. Scope *
Detection on a Dried Original Sample Basis
1.1 This test method covers the analysis for the commonly
Concentration Limit
Element
determined trace metals (aluminum, calcium, iron, nickel,
Range (mg/kg) Detection (mg/kg)
silicon, sodium, and vanadium) in laboratory analysis samples
Aluminum 15 to 105 5.0
of raw and calcined petroleum coke by atomic absorption
Calcium 20 to 225 1.0
spectroscopy. Iron 150 to 500 1.5
Nickel 5 to 200 1.5
1.2 The elemental concentration ranges for which this test
Silicon 90 to 420 20
method is applicable and the limits of detection of this test
Sodium 15 to 115 0.2
Vanadium 5 to 500 2.0
method are listed in Table 1.
1.3 The values stated in SI units are to be regarded as the
standard.
4. Significance and Use
1.4 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
4.1 The presence and concentration of various metallic
responsibility of the user of this standard to establish appro-
elementsinapetroleumcokearemajorfactorsinthesuitability
priate safety and health practices and determine the applica-
ofthecokeforvarioususes.Thistestmethodprovidesameans
bility of regulatory limitations prior to use. For hazard state-
of measuring the amounts of those metallic elements in the
ments, see Sections 8-10.
coke sample.
4.2 The test method provides a standard procedure for use
2. Referenced Documents
by the purchaser and seller in the commercial transfer of
2.1 ASTM Standards:
petroleum coke to determine whether the lot of coke meets the
D 346 Practice for Collection and Preparation of Coke
specifications of the purchasing party.
2
Samples for Laboratory Analysis
5. Interferences
D 6299 Practice for Applying Statistical Quality Assurance
Techniques to Evaluate Analytical Measurement System
5.1 Spectral interferences can occur when using other than
3
Performance
the recommended wavelength for analysis or when using
4
D 1193 Specification for Reagent Water
multi-elemental hollow cathode lamps.
3. Summary of Test Method
6. Apparatus
3.1 A representative sample of the petroleum coke is ashed
6.1 Furnace, electric, capable of regulation of temperature
at 525°C under specified conditions. The ash is fused with
at 525°C 6 10°C.
lithium tetraborate (Li B O ), or lithium metaborate (LiBO ).
6.2 Magnetic Stirring Hot Plate.
2 4 7 3
Themeltisdissolvedindilutehydrochloricacid(HCl),andthe
6.3 Platinum Dish, 50 to 58-mL capacity.
resultant solution is analyzed by atomic absorption spectros-
6.4 Platinum Dish, 150 to 200-mL capacity.
copy for the following elements: aluminum, calcium, iron,
6.5 Platinum-Tipped Tongs.
nickel, silicon, sodium, and vanadium.
6.6 Furnace, electric, capable of regulation of temperature
at 950 6 10°C or a Meker type forced air burner.
6.7 Atomic Absorption Spectrophotometer (AAS), equipped
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This test method is under the jurisdiction of ASTM Committee D02 on
as follows:
Petroleum Products and Lubricants and is the direct responsibility of Subcommittee
6.7.1 Background Correction, using either a deuterium (D )
D02.03 on Elemental Analysis.
2
Current edition approved Nov. 10, 2002. Published February 2003. Originally
arc background corrector or other comparable simultaneous
approved in 1990. Last previous edition approved in 1996 as D 5056–96.
background correction system.
2
Annual Book of ASTM Standards, Vol 05.01.
3 6.7.2 Burner Head, capable of supporting a nitrous oxide-
Annual Book of ASTM Standards, Vol 05.03.
4
acetylene flame.
Annual Book of ASTM Standards, Vol 11.01.
*A Summary of Changes section appears at the end of this standard.
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D5056–02
6.7.3 Burner Head, single or multiple-slot, capable of sup- <1.0 to 50 ppm (mg/L). Working standards containing alumi-
porting an air-acetylene flame. num, calcium, iron, nickel, silicon, sodium, and vanadium in
6.7.4 Hollow Cathode Lamps, one for each of the elements concentration ranges below 10 ppm (mg/kg) are to be prepared
to be analyzed: aluminum, calcium, iron, nickel, silicon, daily to ensure stability.
sodium, and vanadium. 7.9 Quality Control (QC) Samples, preferably are portions
of one or mor
...