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Elemental iodine determination by ICP-MS and carbon isotope analysis by EA-IRMS were jointly employed to identify recycled cooking oil from edible oils. Iodine in 204 oils demonstrated that recycled cooking oils can be distinguished from soybean oil, maize oil, colza oil, peanut oil, sunflower oil and olive oil with the exception of tea oil and mixed oil. These two types of oils can be definitively...
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