EXPLANATION
The presence and concentration of various metallic elements in a petroleum coke are major factors in the suitability of the coke for various uses. This test method can be used by the buyer and seller in the commercial transfer of petroleum coke to determine whether that lot of coke meets the specifications of the purchaser. This method can analyze raw and calcined coke for trace elements aluminum, calcium, iron, nickel, silicon, sodium, and vanadium. See complementary ICPAES method for the same analysis for Test Method ASTM D5600 that follows this test method analysis.
TEST SUMMARY
A sample of petroleum coke is ashed at 525° C. The ash is fused with lithium tetra- or meta-borate. The melt is dissolved in dilute hydrochloric acid and the resultant solution is analyzed by AAS. Spectral interferences may occur when using wavelengths other than those recommended for analysis, or when using multi-element hollow cathode lamps.
TEST PRECISION
NOTE: X = The average value of two results in parts per million (milligrams per kilogram).
The bias of this test method has not been determined.