12. Precision and Bias
12.1 The precision of this test method as determined by statistical examination of interlaboratory results is as follows:
12.1.1 Repeatability - The difference between successive test results, obtained by the same operator with the same apparatus under constant operating conditions on identical test material would, in the long run, and in the normal and correct operation of the test method, exceed the following values only in one case in twenty:
12.1.2 Reproducibility - The difference between two single and independent results, obtained by different operators working in different laboratories on identical test material would, in the long run, and in the normal and correct operation of the test method, exceed the following values only in one case in twenty:
12.2 Bias - The bias of the procedure in this test method has not yet been determined but is now under consideration by the responsible subcommittee.
13. Keywords
13.1 carbon dioxide; ethane; ethylene; gas chromatography; hydrocarbons; methane