膜去溶-电感耦合等离子体质谱法测定高纯氟化铍中痕量稀土元素  

Determination of trace rare earth elements in high purity BeF_(2) samples by membrane desolvation inductively coupled plasma mass spectrometry

作　　者：王阿梦 唐晓星[1] 姚剑[1] 李玉兰[1] 马继飞[1] WANG Ameng;TANG Xiaoxing;YAO Jian;LI Yulan;MA Jifei(Key Laboratory of Interfacial Physics and Technology,Shanghai Institute of Applied Physics,Chinese Academy of Sciences,Shanghai 201800;University of Chinese Academy of Sciences,Beijing 100049)

机构地区：[1]中国科学院上海应用物理研究所,微观界面物理与探测重点实验室,上海201800 [2]中国科学院大学,北京100049

出　　处：《分析试验室》2022年第4期392-396,共5页Chinese Journal of Analysis Laboratory

基　　金：国家自然科学基金(11705267,21773289)项目资助。

摘　　要：建立了膜去溶与电感耦合等离子体质谱联用法(MD-ICP-MS)测定高纯氟化铍(BeF_(2))中的稀土元素,比较研究了冷雾化湿法与膜去溶干法进样技术在痕量稀土元素分析中的应用。在优化膜去溶装置参数后,MD-ICP-MS显著提高了元素的分析灵敏度,Ce的信号强度显著增加约5倍;CeO^(+)/Ce^(+)下降了约2个数量级,变化范围降在0.013%~0.019%之间。通过酸纯化器对本底进行了严格的控制,MD-ICP-MS的检出限范围为0.2~2.6 ng/L。对高纯BeF_(2)进行了分析,除了含量极低的稀土元素,ICP-MS与MD-ICP-MS法测定稀土元素的相对偏差均在5%以内。MD-ICP-MS的加标回收率在92.4%~105.2%之间。该方法可为高纯BeF_(2)中痕量稀土元素提供分析支持。The determination of rare earth elements in high purity beryllium fluoride(BeF_(2))by membrane dissolubilization and inductively coupled plasma mass spectrometry(MD-ICP-MS)was established.The application of cold atomization wet method and membrane dissolubilization dry method in the analysis of trace rare earth elements was compared.After optimized membrane desolvation system,the sensitivity of the MD-ICP-MS for element analysis was improved.The signal intensity of Ce was increased by 5-fold,and the CeO^(+)/Ce^(+)was reduced by about 2 orders of magnitude,the variation range of which decreased from 0.013%to 0.019%.Acid purification systems produced high purity acid on demand for use,and detection limit was calculated to be 0.2-2.6 ng/L.The proposed method was demonstrated by analysis of high purity BeF_(2) samples.The relative standard deviations were less than 5%,and the recovery rates were 92.4%-105.2%.This method can be used for accurate analysis of rare earth elements in high purity BeF_(2).

关 键 词：高纯氟化铍 电感耦合等离子体质谱 膜去溶 稀土元素 

分 类 号：O657.6[理学—分析化学] TF845.6[理学—化学]