Establishment of Test Methods for Determination of Total Nitrogen in Fuel Oil

The Japan Petroleum Institute has investigated means for determination of total nitrogen in fuel oils as requested by the Petroleum Association of Japan.This report describes the activity of the subcommittee organized for the establishment of testing methods for nitrogen content in petroleum products and for preparation of a draft for JIS method.The committee has established four methods, macro-Kjeldahl, micro-Kjeldahl, automated Dumas, and microcoulometric titrating which are applicable to the samples containing more than 0.01%N. In addition, an unique technique for coulometrical determination of total nitrogen in many residual oils has been devised.