Hydrocarbon Oil Index and Phenol Index
- Two proficiency testing items (samples) on different concentration levels
- Hydrocarbon oil index: 2 x 1 L per proficiency testing item, no stabilization, but refrigeration
- Phenol index: 2 x 1 L per proficiency testing item; stabilization at pH < 4 with H3PO4 and CuSO4 x 5 H2O 1g/L and refrigeration
- One ground water and one drinking water proficiency testing item (fortified)
- The extent of participation is selectable: hydrocarbon oil index and phenol index or
hydrocarbon oil index only (selection of phenol index only is not possible).
- The evaluation will be carried out in a joint report.
- Details: UBA and Annual Programme 2026
| Parameter |
| Hydrocarbon Oil Index |
| Phenol Index |
| Proficiency testing round |
Registration deadline |
Dispatch |
Organisation |
Proficiency testing item |
Closing date |
| SP11 |
21.04.2026 *)
| 05.05.2026
| UBA |
natural samples |
02.06.2026 |
*) Registration after the registration deadline: on request
- Contact UBA:
Martha Schmid, MSc.
Phone: +43(0) 1 31304 4334