ASTM D5056 Standard Test Method for Trace Metals in Petroleum Coke by Atomic Absorption
12. Report
12.1 Report results for each element as parts per million (milligram per kilogram) or mass percent (1000 ppm (mg/kg) = 0.1 %).
12.1.1 Use three significant figures if the duplicate values do not vary in the first two figures. Use two significant figures when only single values are determined.
13. Quality Control
13.1 Confirm the performance of the instrument or the test procedure by analyzing a quality control (QC) sample (see 7.9).
13.1.1 When QC/Quality Assurance (QA) protocols are already established in the testing facility, these may be used when they confirm the reliability of the test result.
13.1.2 When there is no QC/QA protocol established in the testing facility, Appendix X1 can be used as the QC/QA system.
14. Precision and Bias
14.1 The values in the following statements were determined in a cooperative program following ASTM D02-1007. The calibration blank used during this program was not matrix matched.
14.1.1 Precision - The precision of this test method as determined by the statistical examination of interlaboratory test results appears in Table 3.
14.1.2 Repeatability - The difference between successive results obtained by the same operator with the same apparatus under constant operating conditions on identical test material would, in the long run, in the normal and correct operation of the test method, exceed the values in Table 3 only in one case in twenty.
14.1.3 Reproducibility - The difference between the two single and independent results obtained by different operators working in different laboratories on identical test material would, in the long run, exceed the values in Table 3 only in one case in twenty.
14.2 Bias Statement - The bias for this test method can not be determined since a suitable reference material is not available.
15. Keywords
15.1 ash; atomic absorption; metals; petroleum coke; spectroscopy
