The complexation between Xylenol Orange (XO) and Fe3+ions plays a key role in Fricke-gel dosimeters for the determination of the absorbed dose via UVâvis analysis. In this study, the effect of XO and the acidity of the solution on the complexation mechanism was investigated. Moreover, starting from the results of complexation titration and Equilibrium Restricted Factor Analysis, four XO-Fe3+complexes were identified to contribute to the absorption spectra. Based on the acquired knowledge, a new [Fe3+] vs dose calibration method is proposed. The preliminary results show a significant improvement of the sensitivity and dose threshold with respect to the commonly used Abs vs dose calibration method.
Fricke-gel dosimeter: overview of Xylenol Orange chemical behavior
Liosi, G. M.;Mariani, M.
2017-01-01
Abstract
The complexation between Xylenol Orange (XO) and Fe3+ions plays a key role in Fricke-gel dosimeters for the determination of the absorbed dose via UVâvis analysis. In this study, the effect of XO and the acidity of the solution on the complexation mechanism was investigated. Moreover, starting from the results of complexation titration and Equilibrium Restricted Factor Analysis, four XO-Fe3+complexes were identified to contribute to the absorption spectra. Based on the acquired knowledge, a new [Fe3+] vs dose calibration method is proposed. The preliminary results show a significant improvement of the sensitivity and dose threshold with respect to the commonly used Abs vs dose calibration method.| File | Dimensione | Formato | |
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Liosi 2017.pdf
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11311-1047410 Mariani.pdf
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