scope:

This Japanese Industrial Standard specifies the method for determining the nitrogen content of crude petroleum and petroleum products by the chemiluminescence method. This Standard is applicable to samples containing 1 mg/kg or more of nitrogen in the case of naphtha, kerosene, and gas oil, and samples containing 0.01 % mass fraction or more of nitrogen in the case of crude oil, lubricating oil, and heavy oil. The precision specified in this Standard is not applicable to crude oil and lubricating oil.

The macro-Kjeldahl method is detailed in Annex A.

NOTE 1 For determination of nitrogen content by the microcoulometric titration method, see Annex B.

NOTE 2 The test methods covered by this Standard may fail to accurately determine nitrogen content if the sample is mixed with additives containing nitrogen compounds with nitrogen-nitrogen bond.

WARNING The use of this Standard may involve hazardous materials, operations and equipment. This Standard does not purport to address all of the safety problems associated with its use. It is the responsibility of the user of this Standard to establish appropriate safety and health practices and determine the applicability of the regulatory limitations prior to use.