Rapid analysis of 90Sr in cattle bone and tooth samples by inductively coupled plasma mass spectrometry
Rapid analysis of 90Sr in cattle bone and tooth samples by inductively coupled plasma mass spectrometry
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DOI：
10.1039/d1ja00086a
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发表时间：
2021-06-25
影响因子：
3.4
通讯作者：
Abe, Hironobu
中科院分区：
文献类型：
--
作者：
Koarai, Kazuma;Matsueda, Makoto;Abe, Hironobu
采用电感耦合等离子体质谱(ICP-MS)与质移和固相萃取相结合的方法，实现了牛骨和牙齿中锶-90的快速分析。将电感耦合等离子体质谱的O-2反应模式下的质量移位技术应用于同压元素Zr-90的质量移位，有效地消除了干扰。锶树脂是以4，4‘(5’)-二叔丁基环己基-18-冠-6为载体的聚合物树脂，固相萃取技术可将锶-90从骨和牙齿样品中的干扰基质元素和同量异构体中定量分离。电感耦合等离子体质谱(ICPMS)测定的活度浓度与常规放射学方法测定的活度浓度相当。但对0.1g样品进行电感耦合等离子体质谱检测，检出限低于放射性测定。与放射法相比，电感耦合等离子体质谱分析方法的分析时间从20d缩短到11h。因此，电感耦合等离子体质谱方法可以作为一种快速、实用的方法来测定陆生动物小骨和牙齿样品中的锶-90。
Rapid analysis of Sr-90 in bone and tooth samples of cattle was achieved by inductively coupled plasma mass spectrometry (ICP-MS) coupled with mass-shift and solid-phase extraction techniques. The mass-shift technique with the O-2 reaction mode of ICP-MS was applied to the mass shift of isobaric element Zr-90, effectively removing its interference. The solid-phase extraction technique using a Sr resin, which is a polymeric resin supported by 4,4 '(5 ')-bis-t-butylcyclohexano-18-crown-6, quantitatively separated Sr-90 from the interfering matrix elements and isobars in the bone and tooth samples. The activity concentrations determined by ICP-MS were comparable with those determined by the conventional radiometric method. However, the limit of detection in the ICP-MS measurement of 0.1 g samples was lower than that in the radioactivity measurement. The analytical time of the ICP-MS method was shortened from 20 days to 11 h, compared with the radiometric method. Therefore, the ICP-MS method can be a rapid and useful procedure for determination of Sr-90 in small bone and tooth samples taken from terrestrial animals.