ASTM D1094 standard test method for water reaction of aviation fuels
11. Report
11.1 The report shall include the following:
11.1.1 Change in volume of the aqueous layer to the nearest 0.5 mL.
11.1.2 Rating of the condition of the interface (see Table 2).
11.1.3 Rating of the degree of separation (see Table 1).
12. Precision and Bias
12.1 Precision - The change in volume of the aqueous layer is a measure of water reaction of aviation gasoline and is a qualitative indication of water–miscible components and is not subject to a statement of precision.
12.1.1 It is not practical to specify the precision of the interface rating as a measure of the water reaction of aviation turbine fuels because results of the ratings described in Table 2 are purely qualitative. Table 2 assigns a number to descriptions of interface appearance as a convenient guide to qualitative ratings.
12.2 Bias - The procedure in this test for water reaction of aviation fuels has no bias because the value of volume change and interface rating is defined only in terms of the test method.
13. Keywords
13.1 aviatin gasoline; aviation turbine fuel; fuel water interface surfactants; water reaction; water-soluble additives
