Guan Qiuyun, Sun Yali, Yue Yahui, Liu Xiaoming, Zhao Shouqian
Key Laboratory of Continental Collision and Plateau Uplift, Institute of Tibetan Plateau Research, Chinese Academy of Sciences.
University of Chinese Academy of Sciences.
Anal Sci. 2019 Mar 10;35(3):323-328. doi: 10.2116/analsci.18P309. Epub 2018 Nov 16.
A simplified method using a single column of N,N,N',N'-tetraoctyl diglycolamide (TODGA) resin is developed for the separation of Sr, Nd and Hf with matrix and interference elements from geological samples, and for subsequent determination of their isotopic ratios by multi-collector inductively coupled plasma-mass spectrometry (MC-ICP-MS). The analytes of Sr, Nd and Hf are absorbed by the TODGA resin and eluted with 6 mol/L HNO, 1.2 mol/L HCl and 1 mol/L HNO-1.6 mol/L HF, respectively. The separation procedure is validated by the certified reference materials (CRMs) of BHVO-2, BCR-2 and AGV-2 with analyte recovery greater than 97%. The ratios are measured for Sr/Sr, Nd/Nd and Hf/Hf and the mean values (2σ) are 0.703455 (16), 0.512977 (12) and 0.283108 (8) for BHVO-2, 0.705008 (18), 0.512633 (10) and 0.282878 (4) for BCR-2, and 0.703989 (20), 0.512791 (8) and 0.282982 (8) for AGV-2, which are consistent with the certified values.
开发了一种使用单柱N,N,N',N'-四辛基二甘醇酰胺（TODGA）树脂的简化方法，用于从地质样品中分离锶、钕和铪及其基体和干扰元素，并随后通过多接收电感耦合等离子体质谱（MC-ICP-MS）测定它们的同位素比值。锶、钕和铪分析物被TODGA树脂吸附，分别用6 mol/L硝酸、1.2 mol/L盐酸和1 mol/L硝酸-1.6 mol/L氢氟酸洗脱。通过BHVO-2、BCR-2和AGV-2认证参考物质（CRM）验证了分离程序，分析物回收率大于97%。测量了锶/锶、钕/钕和铪/铪的比值，BHVO-2的平均值（2σ）分别为0.703455（16）、0.512977（12）和0.283108（8），BCR-2的分别为0.705008（18）、0.512633（10）和0.282878（4），AGV-2的分别为0.703989（20）、0.512791（8）和0.282982（8），这些值与认证值一致。
