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. 2019 May 31;411(19):4973–4985. doi: 10.1007/s00216-019-01907-x

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© The Author(s) 2019

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 — Overlay of ESI-MS data (coloured lines) and ICP-MS (black, m/z 75) for aSaccharina latissima young frond, bAlaria esculenta midrib and c Hijiki CRM 7405a. There was a minor time delay for the ESI-MS data and to compensate this, the ICP-MS signal was shifted to a 0.7–0.9-min earlier retention time for all chromatographs. Magnification of close-eluting peaks distinguished with ESI-MS is shown in ESM Fig. S5

Fig. 3 — Overlay of ESI-MS data (coloured lines) and ICP-MS (black, m/z 75) for aSaccharina latissima young frond, bAlaria esculenta midrib and c Hijiki CRM 7405a. There was a minor time delay for the ESI-MS data and to compensate this, the ICP-MS signal was shifted to a 0.7–0.9-min earlier retention time for all chromatographs. Magnification of close-eluting peaks distinguished with ESI-MS is shown in ESM Fig. S5