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Irradiated fruits can be identified by detecting radiation-induced markers with luminescence and ESR analyses for different trading fruits

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Abstract

Photostimulated luminescence (PSL) or thermo-luminescence (TL) analysis and electron spin resonance (ESR) spectroscopy were performed to detect radiation-induced markers in various trading fruits, such as oranges, grapefruits, mandarins, lemons, limes, bananas, and pineapples. All the unknown samples were identified as non-irradiated fruits, and gamma irradiation at 1 kGy permitted dose by Codex and US FDA was applied to investigate radiation-induced markers. The photon counts for all calibrated PSL samples revealed higher than 5000 (positive) except banana. The ESR triplet signals were detected as a radiation-induced marker resulting from cellulose existing in irradiated fruits excluding banana. The unambiguous identification of irradiated banana was impossible by both techniques. However, isolated minerals from all fruit samples showed radiation-induced typical TL glow curves through the normalization step, confirming the feasible application of TL analysis for identifying irradiation status of all the subjected trading fruits.

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Acknowledgments

This study was supported by the Export Promotion Technology Development Program, Ministry of Agriculture, Food and Rural Affairs, Republic of Korea.

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Authors and Affiliations

  1. School of Food Science & Biotechnology, Kyungpook National University, Daegu, 702-701, Republic of Korea

    Yunhee Jo, Hyun-Kyu Kyung & Joong-Ho Kwon

  2. Advanced Radiation Technology Institute, Korea Atomic Energy Research Institute, Jeonbuk, 580-185, Republic of Korea

    Hae-Jun Park

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  1. Yunhee Jo
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  2. Hyun-Kyu Kyung
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  3. Hae-Jun Park
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  4. Joong-Ho Kwon
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Correspondence to Joong-Ho Kwon.

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Jo, Y., Kyung, HK., Park, HJ. et al. Irradiated fruits can be identified by detecting radiation-induced markers with luminescence and ESR analyses for different trading fruits. Appl Biol Chem 59, 59–65 (2016). https://doi.org/10.1007/s13765-015-0132-9

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  • DOI: https://doi.org/10.1007/s13765-015-0132-9

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