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Chromatograms for the (a) direct injection of the standard substance (1 CLA 11.1, 2 CA 9.15 —, and 3 FA 13.2 μg mL–1), (b) real sample extracted with ultrasonication and CPE (as given in Sections 4.3 and 4.4), (c) real sample extracted with ultrasonication (as given in Section 4.3), and (d) direct injection of 5% Triton X-114 (w/v).
