ASTM D1839

ASTM D1839 – Standard Test Method for Amyl Nitrate in Diesel Fuels (Withdrawn 2019)

Description:

Significance and Use

4.1 In diesel fuel, the presence of alkyl nitrates such as amyl nitrate, hexyl nitrate, or octyl nitrate causes a higher residue value than observed in untreated fuel, which can lead to erroneous conclusions as to the coke forming propensity of the fuel. The presence of such alkyl nitrate in the fuel can be determined using this test method. This test method can be used to determine the amount of amyl nitrate that has been added to diesel fuels to improve cetane number. This test method is applicable as a basis for judging compliance with specifications covering amyl nitrate.

Scope

1.1 This test method covers the determination of 0.1 % to 0.5 % by volume amyl nitrate in diesel fuels.

NOTE 1: This test method has been used for the determination of hexyl nitrate in diesel fuels, but has not been cooperatively tested for such samples. For the determination of hexyl nitrate, use standards containing nitrate esters of primary hexanol. Use a density of 0.97 in calculating results.

1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.