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http://dx.doi.org/10.9721/KJFST.2014.46.2.256

Comparison of Photostimulated Luminescence, Thermoluminescence, and Electron Spin Resonance Spectroscopic Analyses on Dried-spices Irradiated by Gamma Ray and Electron Beam  

Jeong, Jin-Hwa (Advanced Radiation Technology Institute, Korea Atomic and Energy Research Institute)
Ahn, Jae-Jun (School of Food Science and Biotechnology, Kyungpook National University)
Baek, Ji-Yeong (Advanced Radiation Technology Institute, Korea Atomic and Energy Research Institute)
Kim, Hyo-Young (School of Food Science and Biotechnology, Kyungpook National University)
Kwon, Joong-Ho (School of Food Science and Biotechnology, Kyungpook National University)
Jin, Chang-Hyun (Advanced Radiation Technology Institute, Korea Atomic and Energy Research Institute)
Jeong, Il-Yun (Advanced Radiation Technology Institute, Korea Atomic and Energy Research Institute)
Publication Information
Korean Journal of Food Science and Technology / v.46, no.2, 2014 , pp. 256-261 More about this Journal
Abstract
This study was conducted to determine the effect of gamma-ray and electron-beam irradiation on dried spices (black pepper, red pepper, parsley, and basil) using the photostimulated luminescence (PSL), thermoluminescence (TL) and electron spin resonance (ESR) methods. The spices were irradiated at 0, 1, 5, and 10 kGy. All non-irradiated spices had photon counts (PCs) less than 700 PCs. The PCs of three irradiated spices (red pepper, parsley, and basil) were clearly distinguishable from those of non-irradiated ones, exhibiting PSL signals higher than 5000 PCs. However, negative PSL counts (<700 PCs) were obtained for most irradiated black pepper, except those irradiated with 5 kGy gamma rays and 10 kGy electron-beams. TL glow curves of the irradiated spices showed a higher peak at $150-250^{\circ}C$. TL ratios were found to be less than 0.1 for non-irradiated spices and higher than 0.1 for irradiated ones. No ESR signal was observed for any irradiated spice except red pepper, which displayed cellulose-based ESR spectra. Therefore, the results suggest that the PSL, TL, and ESR methods are effective detection techniques for dried spices irradiated with electron beams as well as gamma rays.
Keywords
PSL; TL; ESR; dried spice; irradiation; gamma ray; electron beam;
Citations & Related Records
Times Cited By KSCI : 9  (Citation Analysis)
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