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https://hdl.handle.net/10316/5841
Título: | Determination of ochratoxin A in organic and non-organic cereals and cereal products from Spain and Portugal | Autor: | Juan, C. Moltó, J. C. Lino, C. M. Mañes, J. |
Palavras-chave: | Organic; Non-organic; Ochratoxin A; Portugal | Data: | 2008 | Citação: | Food Chemistry. 107:1 (2008) 525-530 | Resumo: | The objective of this work was to know the occurrence of OTA in organic and non-organic cereals and cereal products from Spain and Portugal. A method based on extraction with matrix solid phase dispersion (MSPD) using octylsilica (C8) followed by liquid chromatography coupled with fluorescence detection (LC-FD) was used to determine OTA from the selected samples. Recoveries of OTA from the studied samples spiked at 10 ng/g level ranged from 78% to 89% with a standard deviation of 3.66. The limits of detection and quantification of this method were 0.05 and 0.19 ng/g, respectively. Furthermore, LC-FD after OTA methylation was used to confirm the identity of OTA in all positive samples. This procedure was applied to 83 organic and non-organic samples including rice, wheat, barley, rye, oats and maize from Spain and Portugal. OTA was detected in 22% of the samples, with concentrations ranging from 0.20 to 27.10 ng/g. From the total OTA contaminated samples (n = 18), 72% were organic cereal and 28% were non-organic cereal samples, with mean concentrations of 1.64 and 0.05 ng/g, respectively. The 66% and 34% of contaminated samples were from Spain and Portugal, respectively, with mean concentrations of 0.93 and 0.64 ng/g for each country. Six contaminated samples exceeded the maximum limits (ML) for OTA fixed by European Commission Regulation (5 [mu]g/kg), among them three were from Spain and three from Portugal. | URI: | https://hdl.handle.net/10316/5841 | DOI: | 10.1016/j.foodchem.2007.08.019 | Direitos: | openAccess |
Aparece nas coleções: | FFUC- Artigos em Revistas Internacionais |
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file136b4d288af6416aaaed037ca0aaf41a.pdf | 194.88 kB | Adobe PDF | Ver/Abrir |
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