Fig. 2
The identity of 18F-deoxy-thiamine and the measurements of radioactivity purity and specific activity. a, b Results of co-injection of 18F-deoxy-thiamine with cold standard sample. a was the radio-signal, and the retention time was 9 min 24 s; b was the UV-signal, and the retention time was 8 min 47 s. Radio-signal acquisition system was installed behind UV-signal acquisition system, and the time-lag was about half-minute at the flow rate of 0.8 ml/min. Note that the peak shapes of a, b were the same. c the UV signal of 18F-deoxy-thiamine. UV = 254 nm