%A"Suzuki, Kazutoshi" %A"Sasaki, Motoji" %A"Yoshida, Yuichiro" %A"Haradahira, Terushi" %A"Inoue, Osamu [National Inst. of Radiological Sciences, Chiba (Japan)]" %D1997 %I; Japan Atomic Energy Research Inst., Tokyo (Japan) %2 %J[] %K40 CHEMISTRY, NITROGEN 13, LABELLED COMPOUNDS, SYNTHESIS, AUTOMATION, PROTON BEAMS, IRRADIATION, RADIOACTIVITY, RADIOPHARMACEUTICALS, CARBAMATES %PMedium: ED; Size: pp. 318-322 %TProduction of N-13 labeled compounds with high specific activity %XNitrogen-13 was produced by irradiating ultra pure water saturated with a pure gas (N2, O2, He, H2) with 18 MeV protons. Ion species generated by irradiation were analyzed with radio ion chromatography systems. An automated equipment was developed to synthesize anhydrous (13N)NH3 as a synthetic precursor and (13N)p-nitrophenyl carbamate ((13N)NPC) as a model compound, using the (13N)NH3. The radiochemical yield and specific activity of (13N)NPC was high enough to carry out the receptor study with PET. (author) %0Conference %NJAERI-Conf-97-003; CONF-9603254-;Other: ON: DE97764433; TRN: JP9710143 %1 %CJapan %Rhttps://doi.org/ Other: ON: DE97764433; TRN: JP9710143 JPN %GEnglish