ASTM D2158 Standard Test Method for Residues in Liquefied Petroleum (LP) Gases
12. Report
12.1 Report the results as:
12.1.1 Residue on evaporation to the nearest 0.05 mL, and
12.1.2 Oil stain observation to the nearest 0.1 mL.
12.2 Alternatively, if the application of this test method calls for passing or failing the oil stain requirement at a specified volume of solvent-residue mixture, report the result at the specified volume as "Pass" or "Fail" (see 11.2.7).
13. Precision and Bias
13.1 Precision - Precision has not been determined on this method in terms of residue and oil stain results. Precision had been determined in terms of R and O numbers, as given in Appendix X1.
13.2 Bias - The procedure in this test method for measuring residues in LP Gas has no bias, because the residues are defined only in terms of this test method.
14. Keywords
14.1 contaminants; liquefied petroleum gases; LPG; oil stain; residue
