This method is for the determination of carbon, hydrogen and nitrogen from petroleum products and lubricants using a CHN analyzer. The CHN analyzer combusts or pyrolizes the sample so that gaseous products are formed and are absorbed or chromatographically separated and quantitated using IR, thermal conductivity, chemiluminescence or titrimitry. The CHN results can be used to estimate the processing and refining potentials and yields in the petrochemical industry.
Matrices applicable for this method are crude oils, fuels oils, additives, and residues. This method is not recommended for the analysis of volatile materials such as gasoline, gasoline-oxygenate blends, or gasoline type aviation turbine fuels.
This method was developed using samples in the concentration range of at least 75 to 87 mass % for carbon, at least 9 to 16 mass % for hydrogen, and 0.1 to 2 mass % for nitrogen.
Sample results are typically expressed in mass % carbon, hydrogen, or nitrogen.
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| Hold Times, Preservatives, Preps, Collection, Analytical & Documentation | |
|---|---|
| Holding Time: | None specified in method. |
| Preservatives: | None |
| Required Preps: | None |
| Collection Method: | Grab sampling |
| Analytical Methodology: | CHN Analyzer following ASTM D-5291 |
| Documentation: | |
| Analyte | Formula | CAS Number | Detection Limit | |
|---|---|---|---|---|
* The analytes and detection limits listed for each method represent the typical detection limits and analytes reported for that particular method. Keep in mind that analyte lists may vary from laboratory to laboratory. Detection limits may also vary from lab to lab and are dependent upon the sample size, matrix, and any interferences that may be present in the sample.