Photo- and thermally stimulated luminescence of polyminerals extracted from herbs and spices

E. Cruz-Zaragoza*, J. Marcazzó, V. Chernov

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

8 Scopus citations


Ionizing radiation processing is a widely employed method for preservative treatment of foodstuffs. Usually it is possible to detect irradiated herbs and spices by resorting to luminescence techniques, in particular photo- and thermostimulated luminescence. For these techniques to be useful, it is necessary to characterize the response to radiation of each particular herb or spice. In this work, the thermoluminescence (TL) and photostimulated luminescence (PSL) properties of inorganic polymineral fractions extracted from commercial herbs and spices previously irradiated for disinfestation purposes have been analyzed. Samples of mint, cinnamon, chamomile, paprika, black pepper, coriander and Jamaica flower were irradiated from 50 to 400. Gy by using a beta source. The X-ray diffraction (XRD) analysis has shown that the mineral fractions consist mainly of quartz and feldspars. The PSL and TL response as a function of the absorbed dose, and their fading at room temperature have been determined. The TL glow curves have been deconvolved in order to obtain characteristic kinetics parameters in each case. The results of this work show that PSL and TL are reliable techniques for detection and analysis of irradiated foodstuffs.

Original languageEnglish
Pages (from-to)1227-1231
Number of pages5
JournalRadiation Physics and Chemistry
Issue number8
StatePublished - Aug 2012

Bibliographical note

Funding Information:
J. Marcazzó thanks to DGAPA-UNAM (Mexico) for supporting his postdoctoral position. We acknowledge the financial support from PAPIIT-Universidad Nacional Autónoma de México (grant number IN121109-3 ).


  • Herbs
  • Irradiated food
  • Photostimulated luminescence
  • Polymineral
  • Spices
  • Thermoluminescence


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