Studies were conducted to measure the effect of irradiation treatment on thermoluminescence (TL) values in dried fruits such
as apricots, dates and raisins. For this purpose, inorganic dust particulate (minerals) adhering to the fruit surface was
collected from untreated and treated (0.5, 1.0 and 1.5 kGy) samples. The TL responses of the isolated minerals was measured
in the temperature range of 80–320°C at an increasing rate of 10°C/s. It was observed that peak of the TL signals appeared
at 200°C in each case and generally the magnitude of the peak signals was almost 103 times that of unirradiated samples. Regression and correlation analysis of the data indicated strong relationship between
radiation absorbed dose and TL values at each temperature (r≥0.98). It was concluded that TL measurements could serve as a fast and reliable method for distinguishing as well as determining
absorbed dose in irradiated dried apricot, date and raisin.