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

• Published in: Applied biological chemistry Vol. 59; no. 1; pp. 59 - 65
• Main Authors: Jo, Yunhee, Kyung, Hyun-Kyu, Park, Hae-Jun, Kwon, Joong-Ho
• Format: Journal Article
• Language: English
• Published: Seoul The Korean Society for Applied Biological Chemistry 01.02.2016; Springer Nature B.V; 한국응용생명화학회
• Subjects: Applied Microbiology; Bananas; Biological Techniques; Bioorganic Chemistry; Cellulose; Chemistry; Chemistry and Materials Science; Citrus fruits; Electron paramagnetic resonance; Electron spin; Electron spin resonance; Food irradiation; Fruits; Gamma irradiation; Gamma rays; Glow curves; Irradiation; Lemons; Luminescence; Mandarins; Markers; Minerals; Oranges; Pineapples; Radiation; Radiation effects; Spectroscopy; Spin resonance; 농학; Irradiation marker; Electron spin resonance; Tropical fruits; Photostimulated luminescence; Thermoluminescence
• ISSN: 2468-0834; 2468-0842
• DOI: 10.1007/s13765-015-0132-9

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.