Mohammed Gobara, Ahmad Baraka, Tartrazine Solution as Dosimeter for Gamma Radiation Measurement, Volume 33, International Letters of Chemistry, Physics and Astronomy (Volume 33)
https://www.scipress.com/ILCPA.33.106
Abstract:
    In this study, Tartrazine aqueous solution was investigated as a simple low-dose dosimeter in the range of 20-500 Gy for the high ionizing radiation, gamma ray. Gradual bleaching of Tartarzine solution was observed with dose by measuring the absorbance of Tartarzine-solutions at specified wavelength, λ<sub>max</sub> = 428 nm. Tartrazine concentration (10<sup>–4</sup>, 5 ×10<sup>–4</sup> and 10<sup>–3</sup> M) and solution-initial pH value (5, 7 and 9) were considered as factors affecting degree of bleaching. It was found that Tartarzine-solution color was diminished gradually with selected dose range due to breakdown of the azo bond. The rate of bleaching increases with the increase of solution-initial pH. Increase of Tartarzine-concentration causes widening of range to which solution is susceptible. The post-irradiated effect (24 hours) was found to cause more bleaching. The sensitivity of Tartrazine solution is not regular with the Tartarzine-concentration and regular with pH.
Keywords:
    Degradation, Dosimeter, Gamma Radiation, Sensitivity, Tartrazine