ASTM D6584 for Free and Total Glycerin in B-100 Biodiesel Methyl Esters
ASTM D6584 Test Method for Determination of Free and Total Glycerin in B-100 Biodiesel Methyl Esters By Gas Chromatography
12. Precision and Bias
12.1 It is not feasible to provide a complete precision statement covering repeatability and reproducibility for this test method at this time since a sufficient quantity of repeat tests and samples under the required ASTM protocol are not available. This information is being determined and will be available on or before May 31, 2004.
12.2 Repeatability - As determined by a single laboratory, the difference between successive test results obtained by the same operator with the same apparatus under constant operating conditions on identical test materials would exceed the following values in only one case in twenty. See Table 5.
12.3 Bias - Since there is no accepted reference material suitable for determining bias for the procedure in this test method, bias can not be determined.
13. Keywords
13.1 biodiesel; free glycerin; gas chromatography; methyl esters; total glycerin
