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Table 2 Analysis of the TCM oral liquid preparations and spiked recoveries (n = 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

Samples Spiked level (μg L−1) Relative recovery ± RSD (%)
Beta-cyfluthrin Fenvalerate Tau-fluvalinate Bifenthrin
Simotang oral liquid 20 95.7 ± 1.3 86.8 ± 2.8 100.6 ± 2.9 103.0 ± 1.2
50 83.7 ± 2.6 84.8 ± 2.5 89.7 ± 2.9 98.6 ± 2.6
100 92.7 ± 2.1 90.8 ± 2.5 94.6 ± 1.6 106.0 ± 0.8
Kangbingdu oral liquid 20 94.7 ± 0.9 82.8 ± 2.9 91.0 ± 2.6 91.2 ± 2.1
50 96.1 ± 2.1 89.2 ± 2.7 81.1 ± 1.4 81.0 ± 2.2
100 97.2 ± 2.4 89.5 ± 2.4 90.2 ± 2.7 106.4 ± 1.1
Huaji oral liquid 20 81.9 ± 3.0 81.5 ± 1.1 81.5 ± 1.3 94.7 ± 2.2
50 85.1 ± 3.1 83.8 ± 3.6 88.3 ± 2.2 97.7 ± 5.0
100 84.4 ± 2.1 83.4 ± 2.3 80.1 ± 1.3 94.2 ± 2.7