铒在核反应堆中常做为可燃毒物，该类可燃毒物在制造过程中需对铒进行精确测量，即对工艺过程中的硝酸铒溶液中铒进行测量。实验建立了X射线荧光光谱法（XRF）测定硝酸铒溶液中铒含量的分析方法。结果表明，当选择LiF200晶体时，铒的角度扫描图峰形比较完整；当选择准直器150μm时，铒的峰背比最为好；当选择功率为40kV×40mA时，仪器的综合性能和计数率比较好。铒的质量浓度在1～15mg／mL范围内与其特征线ErLα的强度呈线性，校准曲线的相关系数为0.9936。对硝酸铒标准溶液和硝酸铒实际样品溶液进行测定，并与电感耦合等离子体原子发射光谱（ICP-AES）的测定结果进行比对，两种方法的测定结果一致，实验方法测定结果的相对标准偏差（RSD，n＝6）低于0.7％。
Erbium is usually used as burnable poison in nuclear reactor .The content of erbium in this type of burnable poison should be accurately determined in production process .In other words ,it is necessary to measure the content of erbium in erbium nitrate solution .The analysis method of erbium in erbium ni-trate solution by X-ray fluorescence spectrometry (XRF) was established .The results showed that the peak shape of erbium in angle scanning was relatively complete when LiF 200 crystal was selected .The peak-to-background ratio of erbium was best when 150 μm-collimator was used .In addition ,the overall performance and count rate of instrument were good when the power was 40 kV × 40 mA .The mass con-centration of erbium in range of 1-15 mg/mL was linear to the strength of characteristic line ErLα.The correlation coefficient of calibration curve was 0 .993 6 .The erbium nitrate standard solution and actual er-bium nitrate sample were determined according to the experimental method .The found results were con-sistent with those obtained by inductively coupled plasma atomic emission spectrometry (ICP-AES) .The relative standard deviations (RSD ,n=6) were less than 0 .7% .
参考文献
| [1] | 周世行;石先伟.反应堆反应性及反馈机理研究[J].核电子学与探测技术,2013(8):955-959. |
| [2] | Chul Gyo Seo;Nam Zin Cho.A core design concept for multi-purpose research reactors[J].Nuclear engineering and design,2012Nov.(Nov.):34-41. |
| [3] | 郭纯孝.偏最小二乘法用于铽、钍、铒的同时测定[J].高等学校化学学报,1993(07):911. |
| [4] | 刘永林;邱祖民;周萍;童迎东.沉淀分离-ICP-MS测定金属铒中钨的研究[J].现代科学仪器,2011(5):91-93. |
| [5] | 王佩佩;李霄;宋伟娇.微波消解-电感耦合等离子体质谱法测定地质样品中稀土元素[J].分析测试学报,2016(2):235-240. |
| [6] | 李景喜;朱志伟;尹晓斐;韩彬;郑立;王江涛;王小如.南大西洋中脊表层沉积物中稀土元素的含量及分布模式分析[J].分析化学,2015(1):21-26. |
| [7] | 张祥;陆晓明;金德龙;何伟.熔融制样-X射线荧光光谱测定不锈钢渣中10种组分[J].冶金分析,2016(1):40-44. |
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