BTEX and MTBE
- two samples on different concentration levels
- 600 mL per sample
- Natural samples: one ground water sample (partly fortified), one surface water sample
- Details: UBA and Annual Programme 2023.
- Synthetic samples (IFA): concentration range: 0-25 µg/L
- In round CB10 there is the possibility to order BTEX/MTBE and VHH together at a reduced price.
- The specified standard deviations for proficiency assessment (z-score-criteria in %) and lower limits apply to synthetic samples in the year 2023
and are calculated from interlaboratory comparisons 2012-2022.
At regular intervals the standard deviations are recalculated and updated.
| Parameter |
standard deviation for proficiency assessment
based on the target value |
Lower limit |
|---|
| Benzene |
15 % |
0.5 µg/L |
| Ethylbenzene |
17 % |
0.5 µg/L |
| Toluene |
14 % |
0.7 µg/L |
| Sum of m- and p-Xylene |
19 % |
1.4 µg/L |
| o-Xylene |
15 % |
0.5 µg/L |
| MTBE |
14 % |
0.1 µg/L |
| Round |
Dispatch |
Organisation |
Samples |
Closing date |
B13* |
13.06.2023
| UBA |
natural |
11.07.2023 |
| B-CB10 |
16.10.2023 |
IFA |
synthetic |
10.11.2023 |
*round B13: cancelled due to insufficient number of participants; alternative: round B-CB10 (IFA, 2023) or natural samples (UBA, 2025)
- Contact IFA:
Caroline Stadlmann, Ing.
Phone: +43(0) 1 47654 97306
- Contact UBA:
Martha Schmid, MSc.
Phone: +43(0) 1 31304 4334