Table 4 Precision and accuracy results in whole blood.

From: Protoporphyrin IX plasma and blood pharmacokinetics and brain tumor distribution determined by a validated LC–MS/MS method

Analyte

QC ID

Nominal Conc. (nM)

Intra-batch (first batch)

Inter-batch

n

Mean Calculated conc. (nM)

Accuracy (%)

CV (%)

n

Mean Calculated conc. (nM)

Accuracy (%)

CV (%)

PPIX

LLOQ QC

10.0

5

10.9

108.9

10.4

15

11.0

110.0

6.2

LQC

30.0

5

31.2

104.1

3.1

15

31.6

105.3

3.8

MQC

62.9

5

59.9

95.2

2.4

15

64.4

102.4

5.8

HMQC

624

5

592

94.9

1.9

15

625

100.1

4.4

HQC

1520

5

1440

94.8

2.2

15

1550

101.9

6.5