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This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License
Article
Proficiency Testing Scheme for Pesticides in Honey
Author(s)
Elvire Messineo, Emeline Dioré, Nicolas Le Baron and Abdelkader Boubetra
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DOI:10.17265/2161-6264/2016.04.009
Affiliation(s)
Interprofessional Bureau of Analytical Studies (BIPEA), 189 Rue d’Aubervilliers, Paris 75018, France
ABSTRACT
Agricultural contamination with pesticides is a challenging problem for
both human and bee health. Consequently, a number of laboratories performing pesticides residues analyse in honey
and honey products has gradually increased in recent years. In the framework of
their accreditations according to ISO 17025 standard, these laboratories must
control their performances through interlaboratory comparison. Interprofessional
Bureau of Analytical Studies (BIPEA) organizes regular
proficiency testing schemes (PTS)
in many analytical domains, including the analysis of pesticides in honey, to
compare the performances of the laboratories. As an example, one test was conducted in
October 2015 using an organic honey
spiked with 21 pesticides, at levels between 15 µg/kg and 200 µg/kg, with 27
participating laboratories. This test was intended for the identification and
quantification of 21 molecules of pesticides residues. The techniques used by
the laboratories were GC-MS-MS, LC-MS-MS, GC-MS and
GC-ECD, according to the molecules. Participating laboratories were required to
return their results on a dedicated website after a period of one month, and a
statistical treatment of the data was performed according to ISO 13528
standard. Assigned (consensus) values were calculated from the participants’
results and the performances of the laboratories could then be evaluated
individually and collectively according to ISO 17043 standard. The results of
this test were satisfactory for detection and quantification, whatever the
analytical technique. The molecules were
correctly identified by the laboratories and the recovery rates ranged from 56%
up to 88%. The dispersions of the results, studied through the coefficients of
variation, were also satisfactory ranging from 7% to 30%. This test showed that
the laboratories participating routinely in this kind of tests are very
competent in the analysis of pesticides residues in honey. It also allowed the
participating laboratories to draw [...]
up a general inventory of their analytical skills, and it was a very useful
tool to detect bias or non-compliant results. It acted as a warning signal for the implementation of corrective
and/or curative actions in the laboratories.
KEYWORDS
Proficiency testing schemes, pesticides, honey, quality control, laboratory performance.
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