| Author(s) | A.A. Basfar and F. Abdel Rehim |
| Affiliation | Institute of Atomic Energy Research, King Abdulaziz City for Science and Technology, P.O. Box 6086, Riyadh-11442, Saudi Arabia |
| Title | Improved Method for Detection of Irradiated Food Containing Bones by Electron Spin Resonance (ESR) |
| Source | Journal of King Saud University. Agricultural Sciences. Volume 15, No 1. (2003/1423) |
| Abstract | Abstract. The use of the electron spin resonance (ESR) spectrometry technique for the assessment of pre-dose in irradiated food containing bones still needs additional efforts to obtain more accurate results. In the present study a different method from the accepted practice is used for the ESR measurements of irradiated bone. In this method the ESR first-derivative spectra of irradiated bones were recorded together with the Mn2+ ESR signal. In the mixed second-derivative ESR spectrum, the two primary peak heights were measured. The first height (h1) is the peak-to-peak height of g=2.0021 resonance for bones. The second height (h2) was measured as the vertical separation of the upper peak of the Mn2+ 4th spectral line (g=1.9807) and the lower peak of bones (g=2.0012). The ratio between these two heights h1/h2 is found to be proportional to the absorbed dose. Improved reproducibility of ESR measurements and dosimetric response properties are achieved by selecting the quantity h1/h2. |
