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. 2018 May 16;410(18):4481–4494. doi: 10.1007/s00216-018-1105-8

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© The Author(s) 2018

Open Access This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

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Fig. 3 — MRM-chromatograms of the modified Alternaria toxins AOH-3-S (a) and AME-3-S (b) in a naturally contaminated tomato sauce sample (sample #5, AOH-3-S < LOQ, AME-3-S 3.2 ng/g) compared to the respective signals in the tomato sauce matrix-matched standard solution (3 ng/mL). The chromatograms show overlaid quantifier and qualifier transitions for AOH-3-S (m/z 337 → 257 and m/z 337 → 213) and AME-3-S (351 → 256 and 351 → 271), respectively. Signals of higher intensity represent the quantifier transitions