Department of Food Science and Technology, Kyungpook National University, Daegu, Republic of Korea.
Int J Radiat Biol. 2010 Oct;86(10):842-7. doi: 10.31090/09553002.2010.488275.
Considering the commercial use of food irradiation and the prevalence of international trade of irradiated food and agricultural commodities, black soybeans originating from China or Korea were irradiated at 0-5 kGy. Photostimulated luminescence (PSL) and thermoluminescence (TL) were investigated for their ability to identify characteristics that would distinguish irradiated from non-irradiated samples.
Dried black soybeans [Glycine max (L.) Merr.] were irradiated using a Co-60 gamma irradiator or an electron-beam accelerator and then analysed by PSL and TL.
PSL photon counts were higher in irradiated samples than in non-irradiated ones and increased with applied doses, making it possible to distinguish irradiated from non-irradiated samples. The TL analysis revealed glow curves (TL₁) with low intensity for non-irradiated samples but a higher intensity (approximately 200°C) for irradiated samples, showing increased intensities with radiation dose. The minerals were re-irradiated at 1 kGy and the second TL glow curve (TL₂) was measured. Based on the calculated TL ratios (TL₁/TL₂) and the shape of TL₁ glow curves, the irradiated samples could be distinguished from non-irradiated ones.
PSL and TL are effective screening and reference methods for distinguishing gamma ray or electron beam irradiated black soybeans from non-irradiated black soybeans.
考虑到食品辐照的商业用途以及辐照食品和农产品国际贸易的盛行，本研究对来自中国或韩国的黑豆进行了 0-5 kGy 的辐照处理。通过光激励发光（PSL）和热释光（TL）研究其识别特征的能力，以区分辐照和未辐照样品。
使用 Co-60 伽马辐照仪或电子束加速器辐照干燥的黑豆[Glycine max（L.）Merr.]，然后通过 PSL 和 TL 进行分析。
PSL 光子计数在辐照样品中高于未辐照样品，并且随着辐照剂量的增加而增加，从而可以区分辐照和未辐照样品。TL 分析显示，未辐照样品的 TL₁ 发光曲线强度较低，但辐照样品的强度较高（约 200°C），随着辐照剂量的增加，强度增加。对这些矿物质进行 1 kGy 的再辐照，并测量第二次 TL 发光曲线（TL₂）。基于计算的 TL 比值（TL₁/TL₂）和 TL₁ 发光曲线的形状，可以将辐照样品与未辐照样品区分开来。
PSL 和 TL 是区分γ射线或电子束辐照黑豆与未辐照黑豆的有效筛选和参考方法。
