Abstract
Dyed poly vinyl alcohol (PVA) films prepared by a simple technique of casting aqueous PVA solution incorporating a mixture of two dyes namely chlorophenol red (CPR) and Quinaldine Red (QR) on a horizontal glass plate are useful as high dose dosimeter in the dose range 2-30 kGy range. The colour of these films change from deep red to yellow when exposed to gamma radiation. Chloral hydrate was added with different concentrations. The response of the prepared films can be modified either by change of chloral hydrate concentration or ratio of the two dyes. As a result, these films can be used as a dosimeter in two dose ranges. The dosimetric parameters, e.g.; dose response, effect of relative humidity on response as well as pre- and post-irradiation stability of these films were investigated.
Highlights
Ionizing radiation is commonly used for industrial applications of food preservation, blood irradiation, and medical devices sterilization
Dyed polymer films of poly(vinyl alcohol) (PVA)-Quinaldine Red (QR) and poly(vinyl butyral) (PVB) containing QR are useful as routine high dose dosimeter
The absorption spectra of the PVA film containing a mixture of 0.42 phr of chlorophenol red (CPR) and 0.21 phr of QR in presence of 26.4 phr chloral hydrate were recorded before and after irradiation
Summary
Ionizing radiation is commonly used for industrial applications of food preservation, blood irradiation, and medical devices sterilization. The other three parts contain 2 mL CPR and 4 mL QR from stock solution of both dyes and different chloral hydrate concentrations as (0.2, 0.3, 0.4 g) respectively.
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