Fricke-gel dosimeter: overview of Xylenol Orange chemical behavior
Fricke-gel dosimeter: overview of Xylenol Orange chemical behavior
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DOI：
10.1016/j.radphyschem.2017.01.012
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发表时间：
2017-11-01
影响因子：
2.9
通讯作者：
Mariani, M.
中科院分区：
文献类型：
--
作者：
Liosi, G. M.;Dondi, D.;Mariani, M.
二甲酚橙子（XO）与Fe ~（3+）离子的络合作用在紫外-可见光谱法测定吸收剂量的凝胶剂量计中起着关键作用。在这项研究中，XO和溶液的酸度对络合机理的影响进行了研究。此外，从络合滴定和平衡限制因子分析的结果，确定了四个XO-Fe 3+配合物的吸收光谱贡献。在此基础上，提出了一种新的[Fe ~（3+）]-剂量校准方法。初步结果表明，相对于常用的Abs与剂量校准方法的灵敏度和剂量阈值的显着改善。
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 UV-vis 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.