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Table 1 Intra-assay, inter-assay accuracy, and imprecision for VMA in human urine

From: A new approach for urinary vanillylmandelic acid determination using eVol microextraction by packed sorbent coupled to liquid chromatography-tandem mass spectrometry

Analytes

Concentration (μg/mL)

Intra-assay

Inter-assay

Total (%CV)

Mean ± SD (μg/mL)

Accuracy (%)

CV (%)

Mean ± SD (μg/mL)

Accuracy (%)

CV (%)

VMA

0.500

0.550 ± 0.040

110.0

7.3

0.532 ± 0.033

106.4

6.3

9.6

3.50

3.60 ± 0.18

102.9

4.9

3.40 ± 0.22

97.1

6.4

8.1

10.0

11.1 ± 0.5

111.0

3.3

10.7 ± 0.6

107.0

3.9

5.1

80.0

83.6 ± 4.0

104.5

4.6

80.6 ± 4.8

100.8

5.7

7.3