ISSN 2308-4057 (Print),
ISSN 2310-9599 (Online)


To determine the absorbed doses of ionizing radiation of food, it is recommended to use the method of electron paramagnetic resonance (EPR), but, at the same time, determination method improvement is necessary. The objective of the study is improvement of the technique of sample preparation and analysis of the obtained results by means of quantitative estimation of the absorbed doses of ionizing radiation on the basis of EPR spectrum parameters, case study is irradiated meat and fish. Bone tissue samples (BTS) of meat and fish were subject to irradiation processing with ionizing radiation in the following doses: 3, 9, 10, 12 kGy with UELR-10-10C2 linear electron accelerator with energy up to 10 MeV. Study of the irradiated samples was performed with the automated portable X-band EPR spectrometer of the brand Labrador Expert. The improved technique of preparation of bone tissue samples for analysis differs with the increased duration of drying - up to 24 hours, which allows to obtain the stable EPR spectra in multiple replications. Correlation dependence of EPR signal area increase and irradiation dose is determined: for beef it is 0.98, for pork it is 0.98, for poultry it is 0.996 and for fish it is 0.99. Strong statistical relationship between the irradiation dose and the absorbed dose is determined: for beef it is 0.94, for pork it is 0.94, for poultry it is 0.96 and for fish it is 0.94. Processing of EPR spectra of meat and fish BTS by means of amplitudecalculation and EPR peak width and area allows to determine the absorbed dose with a high degree of confidence (p ≤ 0.05). For bone tissue of pork, beef, poultry and fish, irradiated with the dose of 12 kGy, amplitude is 4.8∙10-4, 5.08∙10-4, 1.11∙ 10-4 and 3.44∙10-5 p.u., peak area is - 6.73∙ 10-3, 6.94∙10-3, 3.68∙10-3 and 3.07∙10-3.
Ionizing radiation, bone tissue samples, meat, fish, irradiation dose
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How to quote?
Timakova R.T., Tikhonov S.L., Tikhonova N.V., and Poznyakovskiy V.M. Use of the Method of Electron Paramagnetic Resonance for Determination of Absorbed Doses of Ionizing Radiation of Different Types of Meat and Fish Raw Materials. Foods and Raw Materials, 2017, vol. 5, no. 2, pp. 162–169. DOI: 10.21603/2308-4057-2017-2-162-169.
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