Pb. using natural thallium in a specially designed 2
π
cooling target system. The separation of Pb-activity from the T1 target was carried out by extraction of T1 (Ⅲ) with isopropyl ether and purification of Pb (Ⅱ) with an anion exchanger (201×8 resin) column. After a decay time of 32h
during which an optimum growth of
201
T1 took place
carrier-free
201
T1 was separated from the
203
Pb activities by a second similar anion exchanger. Dependences of the percentage extraction of T1 (Ⅲ) from HC1 solution into isopropyl ether on acidity and concentration of T1 (Ⅲ) in aqueous phase were determined. The thick target yield of
201
T1 is 18.8MBq/µAh. The product possesses a radioisotopic purity of
>
99% and a radiochemical purity of
>
98%It is a sterile
isotonic and pyrogen-free solution with a T1 content of 0.27×10
-7
µg/Bq.
关键词
Keywords
references
E. Lebowits et al . , J. Nucl. Med. , 16 ( 1975 ), 151 .
M. C. Lagunas-Solar et al . , J . Label. Comp. Radiopharm. , 3 ( 1977 ), 189 .
S. M. Qaim et al . , Int. J. Appl. Radiat. Isotopes , 30 ( 1979 ), 85 .