A low tritium pressure gas-liquid exchange technique for labelling organic molecules has been described. Experimental details on the potent narcotic analgesics with specific activities of 51.8—242.0 GBq/mmol are particularly presented. The advantages of the method over the high pressure method are also discussed.
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O. Buchman et al . , J. Label Compounds , 10 ( 1974 ), 2 : 345 .
E. A. Evans et al . , J. Label Compounds , 10 ( 1974 ), 4 : 569 .