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Detection of the Refined Recycled Edible Oil Based on an Ultra-Weak Luminescence Imaging Technique

It has been lacking of reliable techniques for detecting the refined recycled edible oils and distinguishing them from the normal edible oils definitely. In this paper, we report a novel imaging technique, called ultra-weak luminescence imaging technique, which could detect refined recycled edible oils. By analyzing different samples including bottled salad and peanut oil, salad oil in bulk and two kinds of short-term fried oils, we found that this technique not only distinguished different kinds of normal edible oils, but also detected the short-term fried oils. Our results indicate that this technique has a potential to detect the refined recycled edible oils with high specificity and sensitivity, but needs large samples to be proven.