Fumonisins in corn (Zea mays L.) from Southern Brazil
2014
Scussel, Vildes M. | Savi, Geovana D. | Costas, Lea Luzia Freitas | Xavier, José Junior Mendonça | Manfio, Daniel | Bittencourt, Karoline O. | Aguiar, Kin | Stein, Stephanie M.
A total of 232 samples of corn commercialised in Santa Catarina state, Southern Brazil (temperate zone climate), were evaluated from 2007 to 2012 for fumonisins (FBs: FB ₁ and FB ₂). Before performing this study, a FBs method with liquid chromatography and fluorescence detection (ex. 335; em. 440 nm) was validated first. FBs were detected in 46.6% (108 samples), with values ranging from 66 to 7832 µg kg ⁻¹ for FB ₁ and 110 to 1201 µg kg ⁻¹ for FB ₂. The number of contaminated corn samples for FB ₁ and FB ₂ varied and often presented contamination of FB ₁ only. Per year of analysis, the numbers were: n = 22/8(FB ₁/FB ₂), 44/5(FB ₁/FB ₂), 25/12(FB ₁/FB ₂), 4(FB ₁), 6(FB ₁) and 7(FB ₁) in 2007, 2008, 2009, 2010, 2011 and 2012, respectively. The contamination percentage was 42.3/15.4, 59.5/6.8, 43.8/21.1, 36.4, 35.3 and 33.3%, respectively, during these years. Consumers can be exposed to these mycotoxins and their health can be at risk through the consumption of contaminated corn.
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