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. 2021 Dec 21;414(25):7503–7516. doi: 10.1007/s00216-021-03803-9

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© The Author(s) 2021

Open AccessThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

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Fig. 3 — MRM-chromatograms of (a) alternariol monomethyl ether (AME), (b) citrinin (CIT), (c) fumonisin B₁ (FB₁), and (d) fumonisin B₂ (FB₂), comparing a naturally contaminated infant stool sample from the Nigerian cohort, the matrix blank of pooled Austrian infant stool samples, and the spiked matrix blank. For FB₁ and CIT, ¹³C-labeled internal reference standards were utilized. Concentrations in the contaminated Nigerian samples were determined to be 4 ng/g (AME), 64 ng/g (CIT), 76 ng/g (FB₁), and 339 ng/g (FB₂)