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地球学报  2004 

新一代高精度高灵敏度的表面热电离质谱仪(TritonTI)的Nd同位素测定

Keywords: TritonTI质谱仪,高精度Nd同位素测定

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Abstract:

利用在南京大学成矿作用研究国家重点实验室建立的新一代高精度高灵敏度的表面热电离质谱仪(TritonTI),可以实现比以往更高精度的Nd同位素测定。3个国际溶液标样的反复测定结果NdLaJolla:143Nd/144Nd为0.511842±4;NdJNdi1:143Nd/144Nd为0.512104±6;NdJMC:143Nd/144Nd为0.511587±10。1个国际岩石标样的测试结果BCR2:143Nd/144Nd为0512624±3。上述测试结果与国际上很多实验室的测试结果一致,但测试精度优于以往。综合分析表明,利用这一最新型号的表面热电离质谱仪(TritonTI),可以实现高精度的Nd同位素组成测试,测试精度一般优于5×10-6。

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