listino 2015.pdf

Fenvalerate/Esfenvalerate:
analisi di un caso pratico
su un campione reale
Mara Gasparini
ISS – 20 febbraio 2014
1
La storia…
SETTEMBRE 2013
UVA DISIDRATATA proveniente dalla
TURCHIA
2
La storia…
ANALISI RICHIESTE: Fitofarmaci/Pesticidi
ANALITI RISCONTRATI:
FENVALERATE alla concentrazione di 0,57 mg/kg
Fattore di trasformazione 4x (uva disidratata
rispetto a uva fresca)
3
Concentrazione …
Riportando il valore sull’uva da tavola:
0,14 ± 0,07 mg/kg (50% incertezza)
4
LMR secondo ALLEGATI 396/2005
Pesticides - Web Version - EU MRLs (File created on 14/02/2014 11:29)
Groups and examples of
Code
Fenvalerate and Esfenvalerate
individual products to which
number
(Sum of RR & SS isomers) (F)
the MRLs apply (a)
151010
Table grapes
0,1
Pesticides - Web Version - EU MRLs (File created on 14/02/2014 11:32)
Groups and examples of
Code
Fenvalerate and Esfenvalerate
individual products to which
number
(Sum of RS & SR isomers) (F)
the MRLs apply (a)
151010
Table grapes
0,02*
CONFORMITA’ o NON CONFORMITA’
0,14 ± 0,07 mg/kg (50% incertezza)
LMR 0,10 mg/kg
conforme (con incertezza)
LMR 0,02* mg/kg
non conforme
6
ANALITICAMENTE?
È importante ricordare che sia FENVALERATE
sia ESFENVALERATE contengono gli stessi 4
isomeri.
L’unica differenza è la percentuale nei due mix.
FENVALERATE: RS+SR 54% e RR+SS 54%
ESFENVALERATE: RS+SR 15% e RR+SS 85%
7
MA NEI CAMPIONI REALI…
NON CONOSCIAMO QUALE
PRODOTTO E’ STATO USATO
 NON CONOSCIAMO QUALE PESTICIDA
(FENV o ESFENV o MIX o IMPUREZZE)
 IN LABORATORIO SI USA LO
STANDARD CON PUREZZA NOTA

8
RICERCA DI CHIARIMENTI
EFSA Journal 2011;9(11):2432
REASONED OPINION
Review of the existing maximum residue levels (MRLs) for esfenvalerate
according to Article 12 of Regulation (EC) No 396/20051
European Food Safety Authority2, 3
European Food Safety Authority (EFSA), Parma, Italy
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EFSA Journal 2011;9(11):2432
In addition, it is highlighted that the residue definition for
enforcement is proposed to be changed to fenvalerate (any ratio
of constituent isomers including esfenvalerate) instead of the
two existing residue definitions referring to (SS; RR) and (SR;
RS) isomers separately. It is therefore proposed to delete the two
different lists of MRL for fenvalerate isomers and to keep only
one list of MRLs consistent with the proposed residue
definition.
10
EFSA Journal 2011;9(11):2432
Fenvalerate: any ratio of constituent isomers including esfenvalerate
Code number Commodity Existing EU MRL (mg/kg)
151010 Table grapes
151020 Wine grapes
0.1
0.1
-
MRL (mg/kg)
0.3
0.3
Comment
Recommended (a)
Recommended (a)
(a): MRL is derived from a GAP evaluated at EU level, which is fully
supported by data and for which no risk to consumers is identified
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EFSA Journal 2011;9(11):2432
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EFSA Journal 2011;9(11):2432
13
Grazie per l’attenzione
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