碘在银丝上的吸附工艺研究  

Adsorption of Iodine on Silver Wire

作　　者：何佳恒[1] 钟文彬[1] 姜林[1] 李兴亮[1] 王静[1] 马宗平[1] 

机构地区：[1]中国工程物理研究院核物理与化学研究所,四川绵阳621900

出　　处：《核化学与放射化学》2010年第2期121-125,共5页Journal of Nuclear and Radiochemistry

基　　金：中国工程物理研究院军民两用基金;中国工程物理研究院发展基金资助项目(CAEP2009B0301028)

摘　　要：碘在银丝上的吸附是125Ⅰ种子源制备过程中的一个重要环节。对碘在经特殊处理的银丝上的吸附工艺进行了研究,考察了卤化剂类型、卤化时间、吸附时间、pH值、离子浓度、载体量等对吸附能力的影响,初步确定了碘在银丝上的吸附工艺。银丝的酸化:将银丝放入冷的4 mol/L HNO3溶液中,置于振荡器上酸化20 min;银丝的卤化:选择2 mol/L NaClO3作为卤化剂,卤化时间3 h左右;碘在银丝上的吸附工艺:室温、pH≈3、吸附时间30 min、载体量27.5μg,根据对源芯活度的要求来选择吸附液初始活度。It is an important process in which iodine is adsorbed on silver wire during the preparation of 125I seed sources. In this paper, a technique of adsorption of iodine on silver wire was studied. The influence of several factors, such as the type of reagent for halogenation, the time for halogenation, the time for adsorption, pH value, ion concentration, carri- er iodine and so on, on the utilization rate of 131I was investigated, and the effectiveness of our proposed technique for adsorption of iodine on silver wire was confirmed. The procedure is summarized as follows., silver wire acidification, using 4 mol/L HNO3 as halogenation agent, stirring acidificate for 20 rain; silver wire halogenation., used 2 mol/L NaClO3 as halogenate agent, halogenate for 3 h; adsorption of iodine on silver wire. room temperature, pH value for the reaction is about 3, the time for adsorption is 30 rain, carrier iodine is 27.5 μg. Original radioactivity of reaction solution was determined based on radioactivity of sourcecore that user required.

关 键 词：125I 吸附 种子源 

分 类 号：O615.11[理学—无机化学]