13. Report
13.1 Report results of each oxygenate and the total oxygen to the nearest 0.1 mass %.
14. Precision and Bias
14.1 The precision of the method as obtained by statistical examination of interlaboratory results is as follows:
14.2 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, in the normal and correct operation of the test method exceed the following values only in one case in twenty:
14.3 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, exceed the following values only in one case in twenty:
14.4 Bias - No consistent bias was observed with the samples tested in the round robin and since a wide range of base gasolines was not tested, it is not possible to offer a definitive statement of bias except to note that biases were observed in the round robin.
15. Keywords
15.1 alcohols; diisopropyl ether; ethanol; ethers; ethyl tert-butyl ether; methanol; methyl tert-butyl ether; motor gasoline; oxygenate; tert-amyl methyl ether; tert-butanol