Journal of Basic and Applied Sciences  -   Volume 8 Number 2

Radiolytic Reduction of Aqueous Solutions of a Commercial Reactive Dye in the Range 0-100KGY by CO⁶⁰ Gamma Radiation Source

Taqmeem Hussain, Muhammad Shahbaz, Inam-ul-Haq and Hashim Farooq

http://dx.doi.org/10.6000/1927-5129.2012.08.02.04

Abstract: Gamma dosimetric behavior of the aqueous solutions of the Sandalfix Golden Yellow CRL (SGY-145) dye was studied. The sample solutions of two chemical natures i.e., Acidic and Alkaline; were irradiated by Co⁶⁰ γ-sources in the range 0-100kGy. The “Control samples” were remained un-irradiated and also chemically neutral. The dosimetry was done in three phases i.e., Low, Intermediate and High, ranging from 100-1000Gy, 1-10kGy and 10-100kGy respectively. The found values of the “λ_max” and the molar extinction coefficient “ε” of the dye were 467 nm and 3.4×10³ mol^-1cm^-1 respectively. The absorbance (A) of the aqueous solutions was studied at the absorption band maxima (λ_max). The behavior of “Alkaline and Acidic solutions” was checked with the help of curve fitting.

Keywords: Chemical dosimeters, Sandalfix Golden Yellow CRL dye, dosimetry, optical density (OD), radiolytic bleaching.

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