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. 2023 Nov 28;9(12):e22843. doi: 10.1016/j.heliyon.2023.e22843

Table 2.

Precision and accuracy data for withanoside IV, withanolide A and withaferin A.

Analytes Nominal concentration (ng/mL) Intra-day (n = 6)
Inter- day (n = 18)
Observed concentration (ng/ml)
Precision
Accuracy
Observed concentration (ng/ml)
Precision
Accuracy
Mean ± SD (% CV) Mean ± SD Mean ± SD (% CV) Mean ± SD
Withanoside IV LLOQ (1) 0.88 ± 0.14 16.29 87.80 ± 16.29 0.96 ± 0.08 8.33 96.11 ± 8.29
LQC (3) 3.01 ± 0.34 11.41 100.12 ± 11.42 2.91 ± 0.09 3.00 96.86 ± 2.83
MQC (30) 28.75 ± 3.41 11.87 95.84 ± 11.38 29.50 ± 0.80 2.71 98.33 ± 2.65
HQC (75) 67.95 ± 3.85 6.94 90.60 ± 5.14 74.33 ± 5.91 7.95 99.01 ± 7.75
Withanolide A LLOQ (1) 0.95 ± 0.16 17.18 94.66 ± 16.23 0.90 ± 0.05 4.99 90.43 ± 4.08
LQC (3) 3.17 ± 0.10 3.24 105.73 ± 3.37 3.00 ± 0.16 5.24 100.03 ± 5.23
MQC (30) 32.22 ± 1.15 3.57 107.43 ± 3.81 31.51 ± 1.00 3.18 105.03 ± 3.35
HQC (75) 78.99 ± 2.78 3.52 105.32 ± 3.70 79.32 ± 0.38 0.48 104.76 ± 1.69
Withaferin A LLOQ (0.5) 0.50 ± 0.08 16.39 99.53 ± 16.25 0.52 ± 0.04 7.19 104.57 ± 7.24
LQC (1.5) 1.44 ± 0.12 8.07 95.73 ± 7.70 1.47 ± 0.07 5.03 97.74 ± 4.76
MQC (15) 14.35 ± 1.00 6.98 95.65 ± 6.67 14.48 ± 0.20 1.36 96.55 ± 1.31
HQC (37.5) 38.02 ± 2.93 7.71 101.38 ± 7.82 37.39 ± 2.51 6.72 98.33 ± 5.16

LLOQ- Lower limit of quantification.

LQC- Lower quality control.

MQC-Middle quality control.

HQC- Higher quality control.