USABILITY OF AQUEOUS SOLUTIONS OF COMMERCIAL REACTIVE DYE FOR GAMMA DOSIMETRY

The aqueous solutions of the Sandalfix Red C4BLN dye were used to determine the effect of ?-radiation source (Cs137) in the range 0-1kGy. UV/VIS spectrophotometer was used to determine the absorption band maxima (λmax) of the dye which was 543 nm and absorbance (A) of the sample solutions was studied at this λmax at pre and post irradiation stages. The absorbance (A) of the sample solutions was found to be decreased with increasing absorbed dose (D) showing the standard exponential decreasing pattern. The ?-irradiation caused the structural changes in the dye solution and so the discoloration of the dye was found linear with respect to absorbed dose (D).