AMYL NITRATE IN DIESEL FUELS: ASTM D1839
EXPLANATION
See Test Method D 4046 for details substituting amyl for alkyl nitrate. The interferences are the same as in Test Method D4046. This method can also be used for determining hexyl nitrate in diesel fuels provided standards containing nitrate esters of primary hexanol are used.
TEST SUMMARY
Hydrolysis of the ester in sulfuric acid and nitration of m-xylenol by the nitric acid is simultaneously carried out. The nitroxylenol is extracted from the reaction mixture and is reacted with NaOH to form the yellow sodium salt. Residual diesel fuel is removed by ether extraction. The color is measured spectrophotometrically at 452 nm. The concentration of amyl nitrate is determined by reference to a standard curve.
TEST PRECISION
Both repeatability and reproducibility of this test method is reported to be 0.10 volume percent. This test method has no known bias.
