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. Author manuscript; available in PMC: 2019 Jul 21.
Published in final edited form as: Analyst. 2018 Jun 20;143(14):3249–3283. doi: 10.1039/c8an00731d

Fig. 15.

Fig. 15

Surface modified Fe3O4 with mercaptopropionic acid, followed by conjugation of nitrilotriacetic acid (NTA) and subsequently chelating Ni2+ chelation. Reprinted (adapted) with permission from [309] Copyright (2010) American Chemical Society