| 高艳辉,诸洪达,樊体强,刘庆芬,武权.食品中天然铀和钍的三正辛胺萃取-分光光度法联合测定研究[J].中华放射医学与防护杂志,2010,30(2):218-221 |
| 食品中天然铀和钍的三正辛胺萃取-分光光度法联合测定研究 |
| Simultaneous determination of natural uranium and thorium in food by tri-n-octylamine extraction-spectrophotometric method |
| 投稿时间：2009-06-21 |
| DOI： |
| 中文关键词: 三正辛胺 萃取 铀 钍 联合测定 食品 |
| 英文关键词:Tri- n -octylamine Extraction Uranium Thorium Simultaneous determination Food |
| 基金项目: |
| 作者 | 单位 | E-mail | | 高艳辉 | 300192 天津,北京协和医学院 中国医学科学院 放射医学研究所,天津市分子核医学重点实验室 | | | 诸洪达 | 300192 天津,北京协和医学院 中国医学科学院 放射医学研究所,天津市分子核医学重点实验室 | zhuhda@yahoo.com.cn | | 樊体强 | 300192 天津,北京协和医学院 中国医学科学院 放射医学研究所,天津市分子核医学重点实验室 | | | 刘庆芬 | 300192 天津,北京协和医学院 中国医学科学院 放射医学研究所,天津市分子核医学重点实验室 | | | 武权 | 300192 天津,北京协和医学院 中国医学科学院 放射医学研究所,天津市分子核医学重点实验室 | |
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| 摘要点击次数: 2777 |
| 全文下载次数: 2011 |
| 中文摘要: |
| 目的 建立食品中天然铀和钍联合测定的方法。 方法 基于N235萃取-分光光度法和三正辛胺(TOA)与N235的化学类似性,通过以TOA代替N235完成了必要的条件实验研究并获得了主要分析步骤的最佳条件。集合所获各项最佳条件,建立了本法的实验程序的方法学依据并对所建方法进行了验证。 结果 本方法对Th和U的最低探测限分别为3.47×10-8 g/g灰和 9.47×10-8 g/g灰。Th和U的加标回收率分别为98.7%和96.7%,相对标准偏差分别为±5.95%和±6.31%。对主要种类食品样品的铀、钍含量进行了测定,其化学回收率为70%～90%。结论 首次建立了食品中三正辛胺萃取-分光光度法作为天然铀、钍联合测定的方法。本法简便快速、准确度和精密度好。 |
| 英文摘要: |
| Objective To establish a method which can determine the natural uranium and thorium in food simultaneously. Methods Based on N235 extraction-spectrophotometric method and chemical similarity between TOA and N235, necessary condition experiments were finished by substituting TOA for N235, the best conditions for the main analytical steps were obtained. By adopting these best conditions, methodological bases of the new analytical procedures were established. The new analytical method has been tested and verified. Results The lowest detectable limits of the method for Th and U were 3.47×10-8 g/g ash and 9.47×10-8g/g ash, respectively. The recovery of standard addition of Th and U were 98.7% and 96.7%, respectively. The relative standard deviation of Th and U were ±5.95% and ±6.31%, respectively. The uranium and thorium contents in main types of food samples were determined with the recoveries between 70% and 90%. Conclusion The Tri- n -octylamine extraction-spectrophotometric method of simultaneous determination for natural uranium, thorium in food is established for the first time. This method is simple, quick and has good accuracy and precision. |
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