Abstract
In the present study, an attempt has been made to evaluate the contribution of the Gold Nano-Particles (AuNPs) in converting ferrous ions into ferric ions, in standard Fricke chemical dosimetry solution during Gamma irradiation. The quantification of the ferric ions produced was done by analyzing the variation in the intensity of the absorbance peak around 304 nm. Different concentrations of purified AuNPs were added to Fricke solution and absorbance was measured before and after exposure to graded doses of Gamma rays. Absorbance of un-irradiated Fricke solution with and without AuNPs was also measured and compared. Absorption spectra obtained with peak at 303 nm indicate no chemical reaction upon adding AuNPs into Fricke solution. Further, peak observed around 555 nm clearly indicates the stability of the Nano-Particles (NPs) in Fricke solution. For a given dose, a significant increase was observed in the absorbance intensity for Fricke solution with AuNPs, as compared to Fricke solution alone, confirming the effectiveness of AuNPs during irradiation. In the study, changes in absorption peak were also observed when the concentration of AuNPs was varied.
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