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EJNMMI Radiopharmacy and Chemistry
Fig. 2 | EJNMMI Radiopharmacy and Chemistry

Fig. 2

From: A closer look at the synthesis of 2-[18F]fluoroethyl tosylate to minimize the formation of volatile side-products

Fig. 2

Radiochromatograms of the crude mixture of [18F]FEtOTs in a sealed (b) and unsealed reaction vials, and c chromatogram of the cold reference compound confirming the chemical identity of [18F]FEtOTs after analysis by analytical HPLC. The black arrows indicate the signals of the volatile side-products at 2.7 and 4.7 min on the radiochromatograms. The retention time of the cold reference FEtOTs was 8.7 min. HPLC chromatograms are representative of (n = 3) and were performed using an Agilent Zorbax Eclipse Plus C18 (5 µm, 4.6 × 250 mm) analytical column; elution with 0.1% TFA water / MeCN, 55:45 at 1 mL/min; monitored at 254 nm and with a radioactivity detector

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