HIGH-CONCENTRATION 99MTC RECOVERY METHOD AND HIGH-CONCENTRATION 99MTC RECOVERY DEVICE

摘要

PROBLEM TO BE SOLVED: To recover ^99mTc at a high recovery rate and to condensate and recover a radioactive nucleus of ^99mTc in which the quantity of ^99mTc solution in the case where ^99mTc is recovered is reduced as much as possible.;SOLUTION: As an activated carbon, a spherical activated carbon is used which is composed of a composite body and has a uniform shape, of which the average particle size is desirably 0.2 to 0.4 mm or less and which is filled in a filling density greater than that of an activated carbon from coconut shell of 0.37 to 0.46 g/ml. The spherical activated carbon is used to perform ^99mTc elution conditioning treatment in which ^99mTc is selectively adsorbed, a ⁹⁹ Mo solution being residual in a spherical activated carbon layer is eluted by dipping water, and a high-concentration alkali liquid is absorbed in the spherical activated carbon adsorbing ^99mTc, thereby forming a high-concentration liquid alkalinity. The adsorbed ^99mTc for which an alkaline concentration gradient is formed by a low-concentration alkaline liquid and water or by water with respect to the high-concentration liquid alkalinity is recovered as a ^99mTc elution liquid. The recovered ^99mTc solution is purified and conditioned, and the purified and conditioned ^99mTc is recovered.;COPYRIGHT: (C)2013,JPO&INPIT