CCl_4萃取分离碘时放射性碘与载体碘的同位素交换  

ISOTOPIC EXCHANGE OF CARRIER IODINE WITH RADIOIODINE BY CCl_4 EXTRACTION OF IODINE

作　　者：杨维凡[1] 李宗伟[1] 孙秀荣[1] 牟万统[1] 赵之正[1] 谢秀君[1] 秦芝[1] 张立[1] 吴定清[1] 

机构地区：[1]中国科学院近代物理研究所

出　　处：《核化学与放射化学》1994年第1期59-64,共6页Journal of Nuclear and Radiochemistry

摘　　要：研究了用ＣＣｌ＿４萃取法分离４７ＭｅＶ／ｕ的￣（１２）Ｃ离子与￣（１３３）Ｃｓ反应产生的碘时，放射性碘与不同价态的载体碘之间的同位素交换。结果表明：在碱性介质中用ＮａＣＩＯ把载体Ｉ￣－氧化为ＩＯ，再在酸性溶液中用ＮＨ＿２ＯＨ·ＨＣＩ还原到Ｉ＿２，然后用ＣＣｌ＿４萃取分离出碘，放射性碘与载体碘之间的交换是完全的。The isotopic exchange of the radioiodine with the carrier iodine is investigated by CCl_4extraction of iodine formed in the interactopn of 47MeV/u ￣(12)C ions with ￣(133)Cs.The radioio-dine is separated from the other reaction products by the CCl_4 extraction of iodine with thecarriers I￣- IO and IO.The iodine is preciptated as AgI for weighing and counting. Theresults are shown that the complete exchange of radioiodine with the carrier iodine can becarried out using a procedure which consists of the oxidation of I￣- to IO by NaClO in an aL-kaline solution, the reduction of the IO to I_2 with hydroxylamine hydrochloride(NH_2OH·HCl)in the acidic solution and the extraction of I_2 with CCI_4. The exchange rates of the I￣-(I°),IO and IO are 85%, 92% and 94%,respectively.

关 键 词：同位素交换 萃取 四氯化碳 碘 

分 类 号：O613.44[理学—无机化学]