| EPA Method | Test Name | Matrix | MRL | Instrument |
|---|
| EPA 350.1/351.4 | Nitrogen, Total Organic (By Difference Calculation) | Liquid | 0.25 | Calculator |
| EPA 350.1/351.4 | Nitrogen, Total Organic (By Difference Calculation) | Solid | 25 | Calculator |
| EPA 351.2 | Dissolved Nitrogen, Kjeldahl, Total (Colorimetric, Semi-Automated Digester, AAII) | Liquid | 0.1 | Discrete-FIA |
| EPA 351.2 | Dissolved Nitrogen, Kjeldahl, Total (Colorimetric, Semi-Automated Digester, AAII) | Liquid | 0.2 | Discrete-FIA |
| EPA 351.2 | Nitrogen, Kjeldahl, Total (Colorimetric, Semi-Automated Digester, AAII) | Drinking Water | 0.2 | Discrete-FIA |
| EPA 351.2 | Nitrogen, Kjeldahl, Total (Colorimetric, Semi-Automated Digester, AAII) | Liquid | 0.08 | Discrete-FIA |
| EPA 351.2 | Nitrogen, Kjeldahl, Total (Colorimetric, Semi-Automated Digester, AAII) | Liquid | 0.1 | Discrete-FIA |
| EPA 351.2 | Nitrogen, Kjeldahl, Total (Colorimetric, Semi-Automated Digester, AAII) | Liquid | 0.2 | Discrete-FIA |
| EPA 351.2 | Nitrogen, Kjeldahl, Total (Colorimetric, Semi-Automated Digester, AAII) | NonAq Liquid | 20 | Discrete-FIA |
| EPA 351.2 | Nitrogen, Kjeldahl, Total (Colorimetric, Semi-Automated Digester, AAII) | Solid | 20 | Discrete-FIA |
| 351.2 Modified | Nitrogen, Kjeldahl, Total (Colorimetric, Semi-Automated Digester, AAII) Modified for Matrix | Solid | 20 | Discrete-FIA |
| 351.2 Modified | SPLP Nitrogen, Kjeldahl, Total (Colorimetric, Semi-Automated Digester, AAII) Modified for Prep | Solid | 0.2 | Discrete-FIA |
| EPA 351.2/353.2 | Nitrogen, Total (Calculation) | Liquid | 0.05 | Calculator |
| EPA 351.4 | Nitrogen, Kjeldahl, Total (Potentiometric, Ion Selective Electrode) | Liquid | 0.2 | ISE |
| EPA 351.4 | Nitrogen, Kjeldahl, Total (Potentiometric, Ion Selective Electrode) | Solid | 20 | ISE |
| ASTM D1426-93B | Total Kjeldahl Nitrogen with Distillation | Liquid | 0.2 | ISE |
| ASTM D1426-93B Modif | Total Kjeldahl Nitrogen, Digestion/Distillation, Modified for Matrix | Solid | 40 | ISE |