ASTM D5986 for Oxygenates, Benzene, Toluene and Aromatics in Finished Gasoline
ASTM D5986 Standard Test Method for Determination of Oxygenates, Benzene, Toluene, C8-C12 Aromatics and Total Aromatics in Finished Gasoline by Gas Chromatography/Fourier Transform Infrared Spectroscopy
13. Precision and Bias
13.1 Precision - The precision of this test method as determined by a statistical examination of interlaboratory test results is as follows:
13.1.1 Repeatability - The difference between successive results obtained by the same operator with the same apparatus under constant operating conditions on identical test materials would, in the long run, in the normal and correct operation of the test method exceed the following values only in one case in twenty:
where:
X = the mean mass or volume % of the component.
13.1.2 Reproducibility - The difference between two single and independent results obtained by different operators working in different laboratories on identical test materials would, in the long run, in the normal and correct operation of the test method exceed the following values only in one case in twenty:
where:
X = the mean mass or volume % of the component.
13.2 Bias - Since there is no certified reference material suitable for determining the bias for the procedures in this test method bias cannot be determined.
14. Keywords
14.1 aromatics; benzene; gas chromatography; GC/IR; gasolines; oxygenates; toluene
