Hazelnut samples of different origin were collected in different stores of Northern Italy and analysed for aflatoxin (AF) contamination by a sensitive chromatographic method based on a tandem mass spectrometer with electrospray ionization. The effects of two extracting solvent mixtures (methanol/water and acetonitrile/water) and different extraction times were tested and compared in terms of recovery. The analysis showed that 35 out of 93 samples (37.6%) were contaminated by AFs. The incidence of positive samples was higher in the Turkish (66.7%) than in the Italian samples (35.9%). The mean AF contamination was higher (p=0.045, Kruskal-Wallis test) in the Turkish samples (0.33 µg kg-1), compared to the Italian (0.14 µg kg-1) ones. Generally, a low level of AFs contamination was found in the positive samples (0.64 µg kg-1), far below the maximum threshold admitted by the European legislation. AFG1 was the most diffused aflatoxin, found in 19 samples.
Aflatoxin monitoring in Italian hazelnut products by LC-MS
PRELLE, Ambra;SPADARO, Davide Carmelo;GARIBALDI, Angelo;GULLINO, Maria Lodovica
2012-01-01
Abstract
Hazelnut samples of different origin were collected in different stores of Northern Italy and analysed for aflatoxin (AF) contamination by a sensitive chromatographic method based on a tandem mass spectrometer with electrospray ionization. The effects of two extracting solvent mixtures (methanol/water and acetonitrile/water) and different extraction times were tested and compared in terms of recovery. The analysis showed that 35 out of 93 samples (37.6%) were contaminated by AFs. The incidence of positive samples was higher in the Turkish (66.7%) than in the Italian samples (35.9%). The mean AF contamination was higher (p=0.045, Kruskal-Wallis test) in the Turkish samples (0.33 µg kg-1), compared to the Italian (0.14 µg kg-1) ones. Generally, a low level of AFs contamination was found in the positive samples (0.64 µg kg-1), far below the maximum threshold admitted by the European legislation. AFG1 was the most diffused aflatoxin, found in 19 samples.File | Dimensione | Formato | |
---|---|---|---|
47 - FACB2 - aflatoxins hazelnuts.pdf
Accesso riservato
Tipo di file:
PDF EDITORIALE
Dimensione
241.07 kB
Formato
Adobe PDF
|
241.07 kB | Adobe PDF | Visualizza/Apri Richiedi una copia |
47 FACB postprint.pdf
Open Access dal 19/07/2013
Tipo di file:
POSTPRINT (VERSIONE FINALE DELL’AUTORE)
Dimensione
233.93 kB
Formato
Adobe PDF
|
233.93 kB | Adobe PDF | Visualizza/Apri |
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.