ASTM D2392-15(R2021) pdf free download

ASTM D2392-15(R2021) pdf free download.Standard Test Method for Color of Dyed Aviation Gasolines
1. Scope
1.1 This test method covers the determination of the accept- ability of color of dyed aviation gasolines. 1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appro- priate safety, health, and environmental practices and deter- mine the applicability of regulatory limitations prior to use. For specific warning statements, see Annex A1. 1.4 This international standard was developed in accor- dance with internationally recognized principles on standard- ization established in the Decision on Principles for the Development of International Standards, Guides and Recom- mendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
5. Material
5.1 The reference liquid can be either distilled water or a sample of the gasoline to be tested before the addition of dye or lead alkyl fluid. (Warning—Gasoline is extremely flam- mable. See A1.1 and A1.2.)
6. Procedure
6.1 Clean the optical surfaces ofthe color comparator. Insert the empty fluid tubes in the comparator and adjust the position of the light source until the intensities of the light from both halves of the comparator split-field are equal. 6.2 Rinse and fill one of the tubes with the reference liquid to be used and insert the plunger. Wipe all excess reference liquid from the outside of the tube and from the top of the plunger, and insert the tube on the left side of the comparator. 6.3 Rinse and fill the other tube with the sample to be tested, and insert the plunger. Wipe all excess sample from the outside of the tube and from the top of the plunger, and insert the tube in the right side of the comparator, so that it is directly below the larger of the two openings when the access door is closed. 6.4 Insert the glass permanent-color standards into the comparator and rotate the standards until the color section can be viewed by transmitted light. Turn on the light source and compare the two fields for hue and intensity with the minimum and maximum color sections of the glass permanent-color standards. 6.5 Determine if the hue is approximately the same as the standard and if the intensity of the color is between, or equivalent to, the minimum and maximum, in which case the color of the sample is acceptable. If the hue is different from the standard or if the intensity lies outside the minimum and maximum color sections, report the test as a fail.
7. Report
7.1 Report the color as Acceptable or Fail.
8. Precision and Bias
8.1 Precision—In the case of pass-fail data no generally accepted method for determining precision is currently avail- able. 8.2 Bias—No justifiable statement can be made on the bias in this test method for determining the acceptability of the color of dyed aviation gasoline because it is a pass-fail test.
9. Keywords
9.1 aviation gasoline; color; dyed aviation gasoline; gaso- line