Petroleum and Petrochemical Test Directory: N
Intertek provides test methods for the analysis of petroleum, petroleum refined products, and petrochemical feedstocks and products.
| Test Description | Test Method |
| NACE Corrosion, Corrosion Services | TM0 172 |
| Naphthalenes | ASTM D1840 |
| Needle Penetration of Bituminous Materials | IP 49 |
| Neutralization Value of Mineral Insulating Oils | BS 148 |
| Nitrogen - Bases | UOP 269, 313 |
| Nitrogen by Oxidative Combustion and Chemiluminescence | IP 379 |
| Nitrogen Content Kjeldahl | ASTM D3228 |
| Nitrogen Content, Boat Inlet Chemiluminescence | ASTM D5762 |
| Nitrogen Content, Syringe Inlet Chemiluminescence | ASTM D4629 |
| Nitrogen Oxides (as Nitrogen) | BS 3903 |
| Non Volatile Matter in Halogenated Hydrocarbons | ISO 7201-1 |
| Noncondensable gases | ASTM D2504 |
| Non-Volatile Matter (Residue of Evaporation) | ASTM D1353, D2109 |
| Non-Volatile Residue | ASTM D1025 |
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