Table 2 Summary of performance of the formulation step. All % values are calculated in reference to starting pure [¹⁸F]FBB activity

Mass of C18 resin in cartridge (mg)

5

10

10

Number of repeats

n = 1

n = 3

n = 3

Starting pure [¹⁸F]FBB activity (MBq)

7.4

15 ± 11

112 ± 51

Formulation efficiency (%)

77

91 ± 5

81 ± 5

Formulation time (min)

18

22

17

 Activity in waste (%)

19

1 ± 1

3 ± 3

 Fraction collection vial residual activity (%)

3

6 ± 4

2 ± 1

 Cartridge residual activity (%)

0

0 ± 1

1 ± 1

 Residual in the system (%)

N/A

N/A

14 ± 4