Aqueous solution of basic fuchsin as food irradiation dosimeter

Aqueous solution of basic fuchsin as food irradiation dosimeter 1 corresp first-author Correspondence author: hmkhan3@gmail.com Correspondence author: hmkhan3@gmail.com hmkhan3@gmail.com 1 Radiation Chemistry Laboratory, National Centre of Excellence in Physical Chemistry, University of Peshawar, Peshawar 25120, Pakistan Radiation Chemistry Laboratory, National Centre of Excellence in Physical Chemistry, University of Peshawar, Peshawar 25120, Pakistan Dosimetric characterization of aqueous solution of basic fuchsin was studied spectrophotometrically for possible application in the low-dose food irradiation dosimetry. Absorption spectra of unirradiated and irradiated solutions were determined and the decrease in absorbance with the dose was noted down. Radiation-induced bleaching of the dye was measured at wavelengths of maximum absorption λ max (540nm) as well as 510nm and 460 nm. At all these wavelengths, the decrease in absorbance of the dosimeter was linear with respect to the absorbed dose from 50 Gy to 600 Gy. The stability of dosimetric solution during post-irradiation storage in the dark at room temperature showed that after initial bleaching during first ten to twenty days, the response was almost stable for about 34 days. The study on the effect of different light and temperature conditions also showed that the response gradually decreased during the storage period of 34 days, which shows that basic fuchsin dye is photosensitive as well as thermally sensitive. Basic fuchsin Food irradiation Dosimeter Absorbance References Banaras M . Research & development for maintaining post-harvest quality of fruits and vegetables & safety of their food products , in Proceedings of the National Executive Symposium on Technologies Developed for Commercialisation Challenges & Opportunities ( Ihsanullah and SanaUllah , Eds.), NIFA , Peshawar , 2003 : 234 . Research & development for maintaining post-harvest quality of fruits and vegetables & safety of their food products McLaughlin M L , Hussmann E K , Eisenlohr H H , et al . International Journal of Applied Radiation and Isotopes , 1971 , 22 : 135 . International Journal of Applied Radiation and Isotopes Mahesh K . Introductory aspects of radiation , in Techniques of radiation dosimetry ( Mahesh K , Vij D R , Eds.), New Delhi : Wiley Estern Limited , 1985 . Introductory aspects of radiation Nofel M . IAEA Bulleten , 1987 , 29 : 43 . IAEA Bulleten Allen A O . Radiation chemistry of water and aqueous solution . New York : D. Van Nostrand Company, Inc ., 1961 : 18 . Radiation chemistry of water and aqueous solution Holm N W , Zagorski Z P . Aqueous chemical dosimetry , in Manual on radiation dosimetry ( Holm N W , Berry R J , Eds.), New York : Marcel Dekker , 1970 : 83 . Aqueous chemical dosimetry Sehested K . The fricke dosimeter , in Manual on radiation dosimetry ( Holm N W , Berry R J , Eds.), New York : Marcel Dekker , 1970 : 313 . The fricke dosimeter Khan H M , Anwar M . J Radioanal Nucl Chem Letters , 1993 , 175 : 199 . J Radioanal Nucl Chem Letters Khan H M , Anwar M . J Radioanal Nucl Chem Letters , 1993 , 175 : 191 . J Radioanal Nucl Chem Letters Elssy N B , Dung C Y , Walker M L , et al . Radiation Physics and Chemistry , 1995 , 46 : 1189 . Radiation Physics and Chemistry 10.1016/S1001-8042(07)60035-9 TL818,TQ615.3 2007-03-06 2007-06-20 2021-01-19 2007 Nuclear Science and Techniques 03 18