Figure 1: The Absorption scanning of FeNPs-PEG, they were synthetized by iron salt coprecipitation method. Three absorption bands were detected by Uv-Vis at 240 nm which correspond to PEG, the second at 360 nm that corresponds to FeNPs and the third at 260 nm that corresponds to FeNPs-PEG. The presence of both components was corroborated submitting PEG and FeNPs separately.