IS 1448 : Part 155 : 2020 Methods of Test for Petroleum and its Products [ P : 155 ] Determination of Trace Nitrogen in Liquid Petroleum Hydrocarbons by Oxidative Combustion with Chemiluminescence Detector
New Standard from Last Update.
1. Scope
1.1 This standard [P : 155] describes the procedure for measuring total trace nitrogen naturally found in liquid hydrocarbons (boiling range from approximately 50 to 400°C), with viscosities between approximately0.2 and 10 cSt at room temperature.
1.2 This method is not applicable to diatomic nitrogen (N2) and has reduced sensitivity to compounds with nitrogen-nitrogen bonds that decompose to produce nitrogen gas.
NOTES:
1 Instruments with horizontal furnace can determine the total trace nitrogen in naphtha, distillates and oils containing 0.3 to 100 mg/kg total nitrogen. Instruments with vertical furnace and auto injector are capable for determination of nitrogen in liquid hydrocarbons at concentrations ranging from 50 to 300 ng/g (mass in ppb). It is also applicable to highly volatile samples such as pentane through the use of cooled sampling system.
2 This test method can be applied to sample types outside the range of the scope by dilution of the sample in an appropriate solvent to bring the total nitrogen concentration to within the range covered by the test method. However, it is theresponsibility of the analyst to verify the solubility of the sample in the solvent.
2. References
The following standards contain provisions, which, through reference in this text, constitute provisions of the standard. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below:
IS No. Title
1448 Methods of test for petroleum and its products
[P : 16] : 2014/ ISO 3675 : 1998 Density, relative density or API gravity of crude petroleum and liquid petroleum products by hydrometer method (third revision)
[P : 32] : 1992 Density and relative density (second revision)