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. 2012 Mar 26;10(4):712–726. doi: 10.3390/md10040712

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© 2012 by the authors; licensee MDPI, Basel, Switzerland.

This article is an open-access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/3.0/).

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Mass chromatograms of the LC-ESI-CID-MS/MS obtained under MRM operation of the TTX standard and naturally-contaminated samples of Charonia lampas and Lagocephalus sceleratus. (A) MRM of TTX standard (1500 ng/mL), m/z 320 > 302; (B) Extracted Ion Chromatogram (XIC) of a naturally-contaminated sample of C. lampas with TTX and the analogues 4-epiTTX; 5,6,11-trideoxyTTX; monodeoxyTTX; 4,9-anhydroTTX; (C) XIC of a naturally-contaminated sample of L. sceleratus with the analogues 11-norTTX-6-ol m/z 290 > 272.