- Ημερομηνία δημοσίευσης
- 2 Δεκέμβριος 2016
Determination of 4 marker PAHs in smoked black pepper
The European Union Reference Laboratory for Polycyclic Aromatic Hydrocarbons organises a proficiency test on the determination of 4 marker PAHs in smoked black pepper.
The objective of this study is to evaluate the capabilities of European National Reference Laboratories (NRLs) and Official Food Control Laboratories (OCLs) in the determination of the target analytes and their sum in smoked black pepper.
Participation is mandatory and free of charge for National Reference Laboratories (NRLs) for PAHs.
The participation fee for official food control laboratories is 450 Euro per participation.
Test material and analytes
The participants will be provided with an amber glass vial containing approximately 22 g of smoked black pepper. The target analytes are listed in the following table.
|SUM of the 4 marker PAHs|
Participants will also receive a standard solution in either acetonitrile or toluene with disclosed content, which may be used for verification of instrument calibration.
Participants are requested to perform three independent analyses of each sample. These analyses shall be performed on the same day. Participants have to report the results for individual analytes of the replicate analyses. These results have to be reported corrected for recovery.
Participants will be also asked to report a single value for scoring, the "final value", both for the individual analytes as well as for the sum of the four marker PAHs. These results will have to be reported corrected for recovery and have to be accompanied by the respective measurement uncertainty.
Further details will be communicated to participants at a later stage.
The performance of the participants in the determination of PAHs in smoked black pepper will be rated by z-scores and zeta-scores.
The standard deviations for proficiency assessment will be derived:
- For the four individual target analytes, from the fitness-for-purpose function given in Commission Regulation (EC) No 333/2007, assuming a value of 0.3 µg/kg for the limit of detection.
- For their sum, from the sP - values of the individual analytes, applying the law of uncertainty propagation.
|Reporting of results:||4 weeks after the dispatch of the samples|
|Reporting to participants:||October 2016|
|Sample dispatch:||second half of March 2016|