CCl_4萃取分离碘时放射性碘与载体碘的同位素交换
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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。Abstract: ISOTOPIC EXCHANGE OF CARRIER IODINE WITH RADIOIODINE BY CCl_4 EXTRACTION OF IODINEYANG WEIFAN；LI ZONGWEI；SUN XIURONG MO WANTONG；ZHAO ZHIZHENG；XIE XIUJUN QIN ZHI；ZHANG LI；WU DINGOING（Institute of Modern Physics，Academia Sinica，Lanzhou，730000）ABSTRACT 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. Key words Isotopic exchange Extraction Cross section~(12)C ion
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[1] １ＨａｌｌＷ，ＷａＩｔｏｎＧＮ．ＣｈｅｍｉｃａｌＥｆｆｅｃｔｓｉｎＦｉｓｓｉｏｎＰｒｏｄｕｃｔＩｏｄｉｎｅｓＦｏｒｍｅｄｉｎＵｒａｎｙｌＩｏｄａｔｅ．ＪＩｎｏｒｇＮｕｃｌＣｈｅｍ，１９６１，１９（１）：１６．２ＤｉｋｓｉｃＭ，ＹａｆｆｅＬ．ＴｈｅＤｉｓｔｒｉｂｕｔｉｏｎｏｆＯｘｉｄａｔｉｏｎＳｔａｔｅｓｏｆＩｏｄｉｎｅＩｓｏｔｏｐｅｓｉｎｔｈｅＦｉｓｓｉｏｎｂｙＰｒｏｔｏｎｓｏｆＮａｔｕｒａＩＵｒａｎｉ－ｕｍ，ＣａｎＪＣｈｅｍ，１９７５，５３（２４）：３８０１．３ＳｐｉｒｉｄｏｎＳ，ＣａｌｕｓａｒｕＡ．ＣｈｅｍｉｃａｌＳｔａｔｅｓａｎｄＴｈｅｒｍａｌＡｎｎｅａｌｉｎｇｏｆｔｈｅ￣（１３）Ｉ，￣（１３３）Ｉａｎｄ￣（１３５）ＩＦｏｒｍｅｄｂｙ￣（２３５）ＵＦｉｓｓｉｏｎＤｕｒｉｎｇＴｈｅｒｍａＩＮｅｕｔｒｏｎＩｒｒａｄｉａｔｅｄｏｆＵｒａｎｙｌＮｉｔｒａｔｅａｔＲｏｏｍａｎｄＬｉｑｕｉｄＮｉｔｒｏｇｅｎＴｅｍｐｅｒａｔｕｒｅｓ．ＪＩｎｏｒｇＮｕｃｌＣｈｅｍ，ｌ９７３，３５（３）：７１３．４ＰａｉｓｓＹ，ＡｍｉｅｌＳ．ＳｅｌｅｃｔｉｖｉｔｙＥｆｆｅｃｔｓｉｎＲｅｃｏｉｌＬａｂｅｌｉｎｇｏｆＭｅｔｈｙｌＩｏｄｉｄｅｂｙＦｉｓｓｉｏｎＰｒｏｄｕｃｅｄＩｏｄｉｎｅ，ＪＡｍＣｈｅｍＳｏｃ，１９６４，８６（１２）：２３３２．５ＢｕｒｇｕｓＷＨ，ＤａｖｉｅｓＴＨ．ＲａｄｉｏｃｂｅｍｉｃａｌＳｔｕｄｉｅｓ：ＴｈｅＦｉｓｓｉｏｎＰｒｏｄｕｃｔ．ＣｏｒｙｅｌｌＣＤ，ＳｕｇａｒｍａｎＮ，ｅｄ．ＮｅｗＹｏｒｋ：Ｍｃ－Ｇｒａｗ－Ｈｉｌｌ．１９５１．２０９．６ＨｕｌｌＤＥ，ＳｈｉｆｏｅｔｔＣＨ，ＬｉｎｄＳＣ．ＥｘｃｈａｎｇｅＲｅａｃｔｉｏｎｏｆＩｏｄｉｎｅｂｙｔｈｅＭｅｔｈｏｄｏｆＲａｄｉｏａｃｔｉｖｅＩｎｄｉｃａｔｏｒｓ．ＪＡｍＣｈｅｍＳｏｃ，１９３６，５８（１）：５３５．７ＭｙｅｒｓＯＥ，ＫｅｎｎｅｄｙＪＷ．ＴｈｅＫｉｎｅｔｉｃｓｏｆｔｈｅＩｏｄｉｎｅ－ＩｏｄａｔｅＩｓｏｔｏｐｉｃＥｘｃｈａｎｇｅＲｅａｃｔｉｏｎ．ＪＡｍＣｈｅｍＳｏｃ，１９５０，７２（１）：８９７．８张淑鸣，兰瑞芝．１４ＭｅＶ中产引起￣（１３３）Ｃｓ（ｎ，γ）反应所形成的￣（１３０）Ｉ的氧化价态分布．核化学与放射化学，１９８７，９（２）：１２１．９ＫｌｅｉｎｂｅｒｇＪ，ＣｏｗａｎＧＡ．ＴｈｅＲａｄｉｏｃｈｅｍｉｓｔｒｙｏｆＦ
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