Radiation-induced coloration of xylenol blue/film containing hexachloroethane for food irradiation applications

Soliman, Yasser S.; Beshir, W.B.; Abdel-Fattah, A.A.; Fahim, Ramy Amer; El‐Anadouli, Bahgat E.

doi:10.1007/s10967-016-4747-z

Cited by 10 publications

(1 citation statement)

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“…Absorbed doses used in such processes span a wide range going from a few tens of grays to over 100 kGy (ISO/ASTM, 2013). Thus, manufacturing dosimeters in the form of films (Chu et al, 1990;Kawamura et al, 2020;Soliman et al, 2016) or gels (Baldock et al, 2010;Basfar et al, 2019;El Gohary et al, 2016;Koeva et al, 2008;Soliman et al, 2017;Sun et al, 2016) that can accurately measure absorbed doses is an important endeavor.…”

Section: Introductionmentioning

confidence: 99%

1,10-Bis(diphenylamino)-4,6-decadiyne as an active component of a radiochromic film dosimeter

Soliman

Abdel-Fattah

Dutremez

2021

Radiation Physics and Chemistry

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Gamma-irradiation processes are very important tools for minimizing microbial load in dry food, inhibiting the proliferation of T-lymphocytes in blood, and for the sterilization of medical devices. To this end, a composite film dosimeter made of a radiation-sensitive monomer, 1,10-bis(diphenylamino)-4,6-decadiyne (DPD), embedded in poly(vinyl alcohol) was prepared using an automatic film applicator system. This polymeric film undergoes a color change from pale yellow to deep orange upon γ-irradiation due to topochemical polymerization of the DPD monomer. This color change is proportional to the amount of absorbed dose. With increasing absorbed doses, gradual disappearance of the  C≡C Raman band of the C≡C-C≡C chemical groups is observed, and new  C≡C and  C=C bands ascribed to the formation of a polydiacetylene with an enyne structure are detected. The irradiated films exhibited two absorption maxima at 470 and 502 nm as measured by UV-Vis spectrophotometry, and the intensities of these bands increased with increasing absorbed doses. Analysis of these films using a high-resolution flatbed scanner (2400 dpi) showed an increase in optical density with increasing absorbed doses up to 269.1 kGy. Stability checks revealed that the irradiated films underwent an increase in the color intensity by ≈3.1% over 50 days of storage. In addition, relative humidities in the range 0-75.3% had a limited impact on the dose response of the films, with a 4% change in this range. The uncertainty (2σ) on dose measurements using the scanner was 4.46%, demonstrating the effectiveness of this film dosimeter for radiation monitoring up to 296.1 kGy.

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