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Fig. 3 | BMC Chemistry

Fig. 3

From: One-step ionic liquid-based ultrasound-assisted dispersive liquid–liquid microextraction coupled with high-performance liquid chromatography for the determination of pyrethroids in traditional Chinese medicine oral liquid preparations

Fig. 3

Typical chromatograms of four pyrethroids in oral liquids—a simotang oral liquid, b kangbingdu oral liquid, c huaji oral liquid—using optimum conditions: (1) beta-cyfluthrin, (2) fenvalerate, (3) tau-fluvalinate, and (4) bifenthrin. In chromatograms (a, c, d), the spiked levels were 0, 20, 100 μg L−1, and b shows the standard solution

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