Preparation and Characterization of a Tumor-Targeting Dual-Image System Based on Iron Oxide Nanoparticles Functionalized with Folic Acid and Rhodamine

Table 1

Determination of concentration of FA and RITC conjugated over the IONPs’ surface.

Initial [FA] [mg mL^−1]	% FA in IONPs’ surface [%]	FA in IONPs’ surface [mg mL^−1]	Initial [RITC] [mg mL^−1]	% RITC in IONPs’ surface [%]	RITC in IONPs’ surface [mg mL^−1]
4.4	98.8	4.3	0.75	96.8	0.72
3.8	98.3	3.7	2.25	96.9	2.18
3.2	98.2	3.1	3.75	97.0	3.63
2.6	98.0	2.5
2.2	97.7	2.1
1.0	96.0	0.9