Figure 2: Percentage of eri coupled to FeNPs-PEG. (filled bars) Coating 1:1, (640 μg/mL of eri interacted with 640 μg/mL of FeNPs- PEG), (bars with squares: black and white) coating 2:1, (640 μg/mL of eri interacted with 320 μg/mL of FeNPs-PEG). The interaction was measured each 30 min during 150 min.