US EPA

6472377 

Journal Article 

Tartrazine Solution as Dosimeter for Gamma Radiation Measurement 

Gobara, MB 

2014 

14 

1 

106-106 

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 Tartrazine solution was observed with dose, by measuring the absorbance of Tartrazine-solutions at specified wavelength, lambda sub( max) = 428 nm. Tartrazine concentration (10 super( -4), 5 x10 super( -4) and 10 super( -3) M) and solution-initial pH value (5, 7 and 9) were considered, as factors affecting degree of bleaching. It was found that Tartrazine-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 Tartrazine-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 Tartrazine-concentration and regular with pH. 

; Radiation; Gamma-radiation; Radiation measurements; Sensitivity; Bleaching; Ionizing radiation; Astronomy; Gamma radiation; pH/