EXPLANATION
Napthalenes when burned tend to have a relatively larger contribution to a sooty flame, smoke, and thermal radiation than single ring aromatics. This test method covers the determination of the total concentration of napthalene, acenapthene, and alkylated derivatives of these hydrocarbons in straight-run jet fuels containing no more than 5 % of such components and having end points below 600° F. This test method determines the maximum amount of napthalenes that could be present.
TEST SUMMARY
The total concentration of napthalenes in jet fuels is measured by absorbance at 285 nm of a solution of the fuel at known concentration. A number of compounds interfere.
This can be minimized by the end point limitation of 600° F. Saturated hydrocarbons, olefins, thiophenes and alkyl or cycloalkyl derivatives of benzene will not interfere.
TEST PRECISION
Where X is the mean result.
Bias of this test method cannot be determined.