Ochratoxin a determination in beer by immunoaffinity column clean-up and high-performance liquid chromatography

Analyses of ochratoxin A (OTA) in domestic and imported beers were perfomed by immunoaffinity column and high - perfomance liquid chromatography (HPLC) using a fluorescence detector. Recoveries of OTA from beer samples spiked at levels from 8.0 to 800pg/mL ranged from 81.2% to 95.0%, with coefficien...

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Veröffentlicht in:Ciência e tecnologia de alimentos 2003-12, Vol.23 (suppl), p.58-61
Hauptverfasser: Prado, G, Oliveira, M.S, Carvalho, E.P, Lima, L.C.O, Veloso, T, Souza, L.A.F, Cardoso, A.C.F
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Sprache:eng
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Zusammenfassung:Analyses of ochratoxin A (OTA) in domestic and imported beers were perfomed by immunoaffinity column and high - perfomance liquid chromatography (HPLC) using a fluorescence detector. Recoveries of OTA from beer samples spiked at levels from 8.0 to 800pg/mL ranged from 81.2% to 95.0%, with coefficient of variation between 0% e 11.0%. Detection limit and quantification limit were 2.0pg/mL and 8.0pg/mL, respectively. Of the total of 26 samples produced in Brazil only 6 (23%), contained trace amounts of OTA. Of the 4 imported beers, in 2, Ireland and Germany, were detected OTA at levels of 25pg/mL and 82pg/mL, respectively. Análises de ocratoxina A em cervejas nacionais e importadas foram executadas por coluna de imunoafinidade e cromatografia líquida de alta eficiência (CLAE) com detetor de fluorescência. Recuperações de ocratoxina A em amostras de cervejas contaminadas em níveis de 8.0 a 800pg/mL, foram de 81,2% a 95%, com coeficiente de variação entre 0% e 11%. O limite de detecção e o de quantificação foram 2.0pg/mL e 8.0pg/mL, respectivamente. De um total de 26 amostras fabricadas no Brasil, somente 6 (23%) apresentavam traços (pg/mL) de ocratoxina A. Das 4 amostras de cerveja importadas analisadas, em duas, Irlanda e Alemanha, foram detectadas ocratoxina A em níveis de 25pg/mL e 82pg/mL, respectivamente.
ISSN:0101-2061
1678-457X
1678-457X
DOI:10.1590/S0101-20612003000400011