This method is for determining total nitrogen in light aromatichydrocarbons, such as benzene. It is applicable to quantitativedetermination of nitrogen at a level of 30 to 400 ng/g. Samplescontaining more than 400 ng/g nitrogen can be analyzed according toASTM D 4629 or D 6069. Halogen and sulfur-containing compounds caninterfere if any one or all of these elements are present in asample in concentration greater than 10%.