Centro di Referenza Nazionale per la Ricerca della Radioattività nel Settore Zootecnico-Veterinario, Istituto Zooprofilattico Sperimentale della Puglia e della Basilicata, Foggia, Italy.
Vet Res Commun. 2010 Jun;34 Suppl 1:S149-52. doi: 10.1007/s11259-010-9374-5.
Food irradiation is a preservation method that has been approved by the European Union for a limited number of foods or food products and within a limited range of doses. European Community legislation states that all foods or food ingredients treated in this manner and authorized for sale in the European Union must be clearly labeled, and that market-level inspections must be carried out to ensure compliance with this regulation. To improve detection of irradiated foods, we evaluated the efficacy of electron spin resonance (ESR) spectroscopy for the identification of seafood that had been subjected to irradiation. Three fish species were tested: gilthead sea bream, cod, and swordfish. For each species, 18 samples of flesh-containing bone were analyzed after either irradiation at 0.5, 1, or 3 kGy or no irradiation (control). Induced radicals in irradiated samples produced distinct ESR signals that allowed differentiation from non-irradiated samples. Within the dose range tested, a linear dose-response relationship was observed (R(2) > 0.94). The gilthead sea bream displayed the highest radiosensitivity. The analytical procedure was validated and successfully used for the routine monitoring of locally marketed seafood. The main aims of the study were to develop a reliable tool for the enforcement of the proper labeling of irradiated foods and to obtain preliminary data on compliance with current laws in the Italian market.
食品辐照是一种已被欧盟批准用于有限数量的食品或食品产品，并在有限剂量范围内使用的保存方法。欧盟法规规定，以这种方式处理并授权在欧盟销售的所有食品或食品成分都必须明确贴上标签，并进行市场层面的检查，以确保符合这一规定。为了提高对辐照食品的检测能力，我们评估了电子自旋共振（ESR）光谱法在识别经辐照的海鲜方面的效果。测试了三种鱼类：金头鲷、鳕鱼和箭鱼。对于每一种鱼，在辐照 0.5、1 或 3 kGy 或未辐照（对照）后，对 18 个含骨鱼肉样本进行了分析。辐照样品中产生的诱导自由基产生了独特的 ESR 信号，从而可以与未辐照样品区分开来。在所测试的剂量范围内，观察到线性剂量响应关系（R(2) > 0.94）。金头鲷显示出最高的辐射敏感性。该分析程序经过验证，并成功用于对当地市场销售的海鲜进行常规监测。该研究的主要目的是开发一种可靠的工具，用于执行辐照食品的正确标签规定，并获得意大利市场目前遵守法律的初步数据。
