| OELCHECK test instrument: | Mettler-Toledo refractive index module RX40/R4, Mettler-Toledo density meter DM40/D4, Mettler-Toledo pH/Ion bench meter SC S220-B |
| Sample quantity: | 25 ml |
| Unit: | % (m/m) |
| Test result: | Refractive index, density, pH. Calculated from refractive index: urea content |
| Analysis for: | AdBlue |
| Brief description: | The result of the measurement of the refractive index of AdBlue depends on its urea concentration. Via a mathematical relationship, the content of urea can be calculated from the measured refractive index. |
| Statement: | The determination of the urea content is an essential quality criterion for the release of AdBlue according to ISO 22241-1. |
| Underlying test standard: | ISO 22241-2 Annex C |
