Both acid value and peroxide value are the important indexes to judge the quality of oils and fats, it is harmful for human health to eat food with excessive acid value and peroxide value, so acid value and peroxide value are the major hygiene indexes under test and control in many sorts of foods. When testing other types of food except edible oils, the extraction of oils and fats is needed first, for the process of the extraction has an influence on the quality of the oils and fats. With the procedure of simulating the extraction of the oil within food products with known edible oil, he best extraction methods can be concluded by setting the duration and temperature in the extraction process of exsolution as well as the effect that the content of sample water has on the testing result of acid value and peroxide value.
