The purpose of this work was to compare the effect of electron and X-ray irradiation on microbiological content and volatile organic compounds in chilled turkey meat. Dose ranges which significantly suppress the pathogenic microflora while maintaining the organoleptic properties of the turkey meat are different for electron and X-ray irradiation. According to the study it is recommended to treat chilled turkey using X-ray irradiation with the dose ranging from 0.5 to 0.75 kGy, while in electron irradiation permissible doses should be within 0.25–1 kGy. Three main groups of volatile compounds: alcohols, ketones, and aldehydes—were found in irradiated and non-irradiated samples of turkey meat. It was found that the total amount of aldehydes, which are responsible for the formation of a specific odor of irradiated meat products, increases exponentially with the increase in the absorbed dose for both types of irradiation. It was established that acetone can be used as a potential marker of the fact of exposure of low-fat meat products to ionizing radiation.
This study provides the algorithm for the estimation of the dose absorbed by minced trout and pieces of chilled trout during 1 MeV electron irradiation. The algorithm uses programming code GEANT 4 based on Monte-Carlo method. The simulation takes into account the electron spectrum as well as the geometry samples. Ferrous sulfate (Fricke) dosimeter and film dosimetry were used to check the algorithm and control the dose parameters during irradiation. The difference between dose rate measured by Fricke dosimeter and simulated dose rate was less than 8 %. The difference between dose rate measured by dosimetric films and simulated dose rate was less than 12 %. The suggested dose estimation algorithm proved to be effective as it successfully determined the dose absorbed by minced trout and pieces of trout. Dosimetry systems can only control the parameters during irradiation treatment. This algorithm can be used to determine the irradiation dose for a product of various geometry, substance, and density.
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