Analyte

Mean, nmol/L

CV, %

Analytical
Recovery, %

Normetanephrine

0.1

12.9

81.4

 

0.2

4.3

88.5

 

0.3

9.6

91.8

 

0.7

2.4

91.7

 

1.4

6.7

97.3

 

2.2

5.4

96.5

 

3.1

14.9

105.7

 

6.3

6.1

107.0

 

11.7

0.7

98.4

 

22.2

4.8

93.0

Metanephrine

0.03

7.4

92.0

 

0.07

9.6

93.3

 

0.1

8.7

95.3

 

0.3

3.4

94.7

 

0.6

2.3

97.0

 

0.9

4.9

99.8

 

1.1

2.4

95.4

 

2.3

6.7

100.8

 

4.6

3.3

100.5

 

8.2

6.3

88.9

Table 2: Linearity and recovery data for normetanephrine and metanephrine in
EDTA plasma.