Occurrence of Fumonisins B₁ and B₂ in homemade medicinal plants: Exposure assessment in northern Turkey

Gürer Soyogul, Ü. and Omurtag Korkmaz, I. and Ulusoylu Dumlu, M. and Omurtag, G.Z. (2016) Occurrence of Fumonisins B₁ and B₂ in homemade medicinal plants: Exposure assessment in northern Turkey. Acta Alimentaria, 45 (1). pp. 54-60. ISSN 0139-3006

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Abstract

This study was conducted to determine the recent level of contamination with Fumonisin B₁ (FB₁) and Fumonisin B₂ (FB₂) in major medicinal plants and to assess consumer exposure in northern Turkey. FB₁ and FB₂ were investigated by using high performance liquid chromatography (HPLC) with fluorescence detection after derivatization with o-phthaldialdehyde (OPA). A total of 78 homemade medicinal plant samples from 14 species were analysed. The recovery in thyme was 67.2±5.2% for FB₁ and 80.8±14.3% for FB₂ spiked with 1 μg g^–1 of each analyte. The minimum detectable amount for the OPA derivatives of FB₁ and FB₂ were 1 ng per injection and 2.5 ng per injection, respectively. The limit of quantitation (LOQ) S/N=10 was 0.078 and 0.313 μg g^–1, and the limit of detection (LOD) S/N=3 was 0.023 and 0.093 μg g^–1 for FB₁ and FB₂, respectively. FB₁ was detected in thyme (0.125) and mint (0.125 and 0.256 μg g^–1) samples; however. FB₂ toxin was below the detection limit in all samples. These results indicate that toxins might be present in homemade medicinal plants; however, the risk of exposure to fumonisins by the consumption of those plants was lower than the estimated TDI limits (<2 μg kg^–1 bw).

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