EFSA 2009 Annual report on pesticide residues - PAN Europe

<strong>2009</strong> EU Report on Pesticide Residues Appendix II
23.3. Quality assurance
23.3.1. Status of accreditation of laboratories, number of laboratories
All 16 laboratories of VSES involved in monitoring and official food control are accredited
according to PN-EN ISO/IEC 17025 by the Polish Centre for Accreditation (PCA). The scope of
accreditation covers different number of matrix/pesticide combinations. The VSES laboratories
use multiresidue methods (MRM) published in European Standards and in some cases in-house
validated methods with GC-ECD/NPD/MS, LC-MS/MS and HPLC-UV/FL determination. In
additional to MRM, single residue methods were used. The improvement of the analytical
performance of the laboratories has been achieved last year. More pesticides were analysed with
a higher sensitivity of detection.
23.3.2. Participation in proficiency tests
In <strong>2009</strong>, 15 of 16 VSES laboratories participated in the proficiency test for fruit and vegetables
organized by EU (EUPT FV-11). Additionally some laboratories participated in other EU
proficiency tests (C3/SRM4 3 labs and butter AO-04 1 lab).
23.3.3. Implementation of EU quality control procedures
All methods used by the VSES laboratories have been validated. Laboratories implemented the
most of requirements of EU on the Quality Control Procedures guideline (SANCO/2007/3131).
23.3.4. Analytical uncertainty
The analytical uncertainty of the results is calculated on the basis of relative standard deviation
of recovery rates during in-house validation procedure. In case of MRL exceedances, the default
expanded uncertainty of 50% is subtracted from the measured value. The sample is defined as
non-compliant if this figure is still above the MRL. When the exceeding of MRL is within the
analytical uncertainty a warming is issued.
23.4. Other information
In all cases of MRL exceedances, risk assessment for acute exposure is conducted by the
toxicologists at the NIPH-NIH (according to SANCO/3346/2001 rev.6). When the dietary intake
calculations indicate a risk for consumer, a national and an international rapid alerts are issued
by RASFF National Contact Point located in SSI and measures are taken to protect consumers.
Because of the differences in methods applied and equipment used by 16 laboratories involved
in official control of foodstuffs, as well as because of numerous changes of MRLs in <strong>2009</strong>, a
different <strong>report</strong>ing levels for some pesticides have been used.
<strong>EFSA</strong> Journal 2011;9(11):2430
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