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. 2015 May 6;407(18):5477–5485. doi: 10.1007/s00216-015-8720-4

Fig. 2.

Fig. 2

Signal intensity recorded by LA-ICP-MS for different ENPs and for metal cations (element standards) from agarose gels versus concentration of (a) Al2O3, (b) Au, and (c) Ag (n ≥ 3). Signal intensity for ENP relative to the respective metal cation (recovery) versus the ENP size is shown in (d)