^(68)Ge-^(68)Ga发生器的研制——硅胶柱上^(68)Ge与Ga、Cu、Zn的分离

PREPARATION AND STUDY OF 68 Ge 68 Ga GENERATOR SEPERATION OF 68 Ge FROM Ga BY ADSORPTION ON SILICA GEL

测量了硫酸介质中Ｇｅ在硅胶上的分配比及Ｇａ、Ｃｕ、Ｚｎ在硅胶上的吸附。研究了硫酸浓度、Ｇａ浓度及原始溶液中Ｇｅ载体量对Ｇｅ分配比的影响。实验结果表明：用１０ｍｍ×３０ｍｍ硅胶柱，上柱料液为５０ｍＬ０．４μｇ／ｍＬＧｅ－０．２８ｍｏｌ／ＬＧａ－９ｍｏｌ／ＬＨ２ＳＯ４溶液，淋洗液为３０ｍＬ９ｍｏｌ／ＬＨ２ＳＯ４，流速为０．８５ｍＬ／ｃｍ２·ｍｉｎ时，Ｇｅ的穿透率为０．３９％，Ｇａ、Ｃｕ、Ｚｎ的去污系数分别为１．８×１０６、５．０×１０６、２．６×１０６。

In order to extract 68 Ge from the solution of the gallium target bombarded by proton by adsorption on silica gel,the distribution coefficient of germanium and adsorption ratio of gallium,copper,zinc in sulphuric acid are determined.Based on the relationships of the distribution coefficient of germanium with the concentration of germanium,sulphuric acid and gallium in the initial solution,0 4 μg/mL germanium 0 28 mol/L gallium 9 mol/L sulphuric acid are selected to be the optimal composition of the raw material solution.Then the results of a seperation process are determined,in which,the φ 10 mm×30 mm silica gel column is used as the adsorption column, 50 mL as the volumn of the raw material solution,30 mL 9 mol/L sulphuric acid as the eluent,and 0 85 mL/cm 2·min as the flow rate.The breakthrough of germanium in this process is 0 39%,and the decontamination factor of 72 Ga, 64 Cu, 65 Zn on silica gel is 1 8×10 6,5 0×10 6,2 6×10 6 respectively.