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Table 1 Accuracy intraday and interday and precision of quality control concentrations

From: Homogeneous liquid–liquid microextraction coupled with HPLC/DAD for determination of nirmatrelvir and ritonavir as COVID-19 combination therapy in human plasma

 

QC concentration

Intraday

Interday

Added

(ng/mL)

Found

(ng/mL)

Found

(%) ± RSD

Added

(ng/mL)

Found

(ng/mL)

Found

(%) ± RSD

NIRMA

LLOQ

1000

1013

101.27 ± 4.86

1000

1005

100.51 ± 0.98

 

LQC

3000

3129

104.30 ± 7.15

3000

3168

105.60 ± 5.47

 

MQC

10,000

9688

96.88 ± 10.92

10,000

10,250

102.50 ± 6.79

 

HQC

18,000

17,676

98.20 ± 1.93

18,000

18,762

104.23 ± 6.33

Mean

   

100.16

  

103.21

% RSD

   

6.22

  

4.891

RITONA

LLOQ

200

179

89.48 ± 13.05

200

182

91.02 ± 11.08

 

LQC

6001

580

96.61 ± 11.25

6001

631

105.22 ± 7.09

 

MQC

6000

5778

96.30 ± 11.28

6000

5565

92.76 ± 4.87

 

HQC

18,000

17,972

99.85 ± 0.33

18,000

18,038

100.21 ± 1.64

Mean

   

95.56

  

97.30

%RSD

   

8.98

  

3.77