5.1 The presence and concentration of various metallic elements in a petroleum coke are major factors in determining the suitability of the coke for various end uses. This test method provides a means of determining the concentrations of these metallic elements in a coke sample.
5.2 The test method provides a standard procedure for use by buyer and seller in the commercial transfer of petroleum coke to determine whether the petroleum coke meets the specifications of the purchasing party.
1.1 This test method covers the analysis for commonly determined trace metals in test specimens of raw and calcined petroleum coke by inductively coupled plasma atomic emission spectroscopy.
1.2 Elements for which this test method is applicable are listed in Table 1. Detection limits, sensitivity, and optimum ranges of the metals will vary with the matrices and model of spectrometer.
TABLE 1 Elements Determined and Suggested Wavelengths
| Element | Wavelengths, nmA ,B | Concentration |
| Aluminum | 237.313, 256.799, 308.216, 396.152 | 15–110 |
| Barium | 455.403, 493.410 | 1–65 |
| Calcium | 317.933, 393.367, 396.847 | 10–140 |
| Iron | 259.940 |
|