OALib Journal期刊
人牙齿中锶的特效树脂分离及其同位素测定
DOI: 10.3724/SP.J.1096.2012.11444
Keywords: 锶 ,同位素 ,牙齿 ,锶特效树脂
Abstract:
采用锶特效树脂(Sr-Spec)建立了快速分离富集人牙齿中微量元素锶,并测定87Sr/86Sr的有效方法。采用HNO3-HClO4体系消解牙齿样品,以8mol/LHNO3为介质上柱,8mol/LHNO3淋洗,0.05mol/LHNO3洗脱,收集淋洗液,蒸干;采用正热电离质谱法进行87Sr/86Sr的测定。结果表明,利用Sr-Spec树脂,不仅能将锶与基质中大量钙分离,并能有效分离同位素测定中干扰元素铷。本方法可以缩短分离时间,提高分离效率,减少试剂用量,降低实验空白。采用本方法对陕南地区人牙齿牙釉质中锶进行分离,测得的87Sr/86Sr值在0.710948~0.711037之间。
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