R. T. Timakova, S. L. Tikhonov, N. V. Tikhonova
Ural State Economic University, ul. 8 Marta, 62, Ekaterinburg, 620144, Russian Federation
Abstract. In Russia there are standards based on the application of the electronic paramagnetic resonance (EPR) method. It enables to identify the irradiated pork by changing the basic parameters of the EPR signal under the influence of different radiation doses. For the experiment, two groups of chilled pork samples weighing 2 kG were formed in 48 h after slaughter. In the first group there were pork samples of meat direction, in the second group – of bacon direction. Meat samples were treated with ionizing radiation in doses from 1 kGy to 12 kGy. EPR spectrometry was performed on the EPR spectrometer Labrador Expert of the X-band. With an increase in the dose up to 12 kGy, the peak amplitude increased by 22.9% to (1.01 ± 0.01) x 10E-4 relative units with the signal broadening by 59.9% to (15.25 ± 0.12) Gs, compared with samples of meat pork, irradiated with the dose of 1 kGy. Irradiation of bacon pork samples led to an increase in the peak amplitude by 22.7% to (8.91 ± 0.03) x 10E-5 relative units and the signal broadening by 63.7% to (15.65 ± 0.16) Gs, respectively. A high degree of direct dependence of the absorbed dose on the dose of radiation and the area of the EPR signal was found, a correlation coefficient was equal to 0.99. With a dose of 2 kGy, the absorbed dose was (2.34 ± 0.03) x 10E-1 kGy, the area of the EPR signal was (1.56 ± 0.11) x 10E-4 relative units. An increase in the radiation dose from 2 to 12 kGy led to an increase in the absorbed dose 22.6 times and in EPR signal area – 43.5 times. In samples irradiated with the dose of 12 kGy, a decrease in antioxidant activity was noted, compared with samples treated with the dose of 1 kGy, 2.08 times for meat pork, 2.07 times for bacon pork. It determines the possibility of using the potentiometric method as a concomitant method to identify irradiated products.
Keywords: pork; EPR signal; antioxidants; radiation; electron paramagnetic resonance method; potentiometric method.
Author Details: R. T. Timakova, Cand. Sc. (Agr.), assoc. prof.; S. L. Tikhonov, D. Sc. (Tech.), prof. (e-mail: Этот адрес электронной почты защищён от спам-ботов. У вас должен быть включен JavaScript для просмотра.); N. V. Tikhonova, D. Sc. (Tech.), assoc. prof.
For citation: Timakova R. T., Tikhonov S. L., Tikhonova N. V. Modern Methods of Identification of Pork Treated with Ionizing Radiation. Dostizheniya nauki i tekhniki APK. 2018. Vol. 32. No. 10. Pp. 90–92 (in Russ.). DOI: 10.24411/0235-2451-2018-11021.