Detection of irradiated spices by different physical techniques

We used thermoluminescence, electron spin resonance, and viscosimetric meas urements to establish whether or not a spice had been irradiated. Thermolum inescence, using the 1788 EN official protocol with an alternative method f or the extraction of mineral impurities, led to proof of irradiation or pro of of no treatment. Electron spin resonance led to different spectrum shape s depending on the chemical composition of the spices; ESR could only be us ed as proof of irradiation up to several weeks after irradiation, and only for some spices. Viscosimetric measurements carried out on spice suspension s led to a presumption of treatment (or of no treatment) and possibly to pr oof of irradiation.