Besides the very low recovery yield, co-extraction of some non fat material was shown by the IR of the extracts (Fig. 1, signals at 3466, 1655 cm −1 ). Despite that PV were evaluated anyway. In fact, independent on the extraction yield, we titrated all the extracted fat samples for the peroxide value, in order to evaluate the reproducibility of our results in relation to the extraction procedure applied. The quantitative extraction assures the representativeness of the fat matter but
the method must also assure the accuracy of the obtained values.
Besides the very low recovery yield, co-extraction of some non fat material was shown by the IR of the extracts (Fig. 1, signals at 3466, 1655 cm −1 ). Despite that PV were evaluated anyway. In fact, independent on the extraction yield, we titrated all the extracted fat samples for the peroxide value, in order to evaluate the reproducibility of our results in relation to the extraction procedure applied. The quantitative extraction assures the representativeness of the fat matter butthe method must also assure the accuracy of the obtained values.
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