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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