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Solid-phase reversible trap for [11C]carbon dioxide using carbon molecular sieves.
- Source :
-
Nuclear medicine and biology [Nucl Med Biol] 1995 Jul; Vol. 22 (5), pp. 667-70. - Publication Year :
- 1995
-
Abstract
- A simple, maintenance-free trapping technique which concentrates and purifies no-carrier-added 11CO2 from gas targets is described. The trap requires no liquid nitrogen cooling and has no moving parts besides solenoid valves. It employs carbon molecular sieves to adsorb 11CO2 selectively from gas targets at room temperature. Nitrogen, O2, CO, NO and moisture in the target gas which could interfere with subsequent radiochemical steps are not retained. Trapping efficiency of 1 g of sieve for 11CO2 from a 240 cm3 target gas dump and helium flush cycle is > 99%, and the adsorbed 11CO2 is recovered quantitatively as a small concentrated bolus from the carbon sieve trap by thermal desorption. This durable trap has performed reliably for more than 1 y with a single charge of carbon sieve. It has simplified the production, and improved the yields of several 11C-radiochemicals at this laboratory.
Details
- Language :
- English
- ISSN :
- 0969-8051
- Volume :
- 22
- Issue :
- 5
- Database :
- MEDLINE
- Journal :
- Nuclear medicine and biology
- Publication Type :
- Academic Journal
- Accession number :
- 7581178
- Full Text :
- https://doi.org/10.1016/0969-8051(94)00150-i