A reliability study on pulsed photo stimulated luminescence testing
There are three common testing methods used to detect food irradiation. This thesis emphasizes one of them, the Pulsed Photo Stimulated Luminescence (PSL) testing method. The principles and measurement procedures of the current PSL testing method are described and discussed. A modified PSL testing method, with a more sound statistical background, is proposed.
The current and the modified PSL testing methods are compared by using realistic data collected in a quality assurance laboratory. Through statistical hypothesis testing and confidence interval analysis, the modified testing method is proved to show a statistically significant improvement upon the existing method. The modified testing method also demonstrates very high reliability. Overall, by adopting a more robust statistical approach to the PSL testing method, significant reductions in cost and turnaround time can be achieved.