基于双稀释剂技术的高精度钼同位素分析方法数据

所有Mo同位素分析在中国地质科学院地质研究所同位素地质实验室使用Nu等离子体ⅡMC-ICP-MS与AridusⅡ Teledyne CETAC Technologies Omaha， NE， USA）在低分辨率模式下进行。样品在0.3 mol l-1 HNO3中以~ 100 μl min-1的速率进样，Mo的典型溶液浓度为~ 100 ng ml-1。采用双稀释剂法校正仪器质量偏差（Li et al. 2011）。100Mo-97Mo双稀释剂和NIST SRM 3134的同位素比值通过Pd 内标方法进行校准，使用104Pd/102Pd=10.922（Siebert等（2001）。采集100个周期的数据块，每个周期的积分时间为3 s。在开始分析每个样品之前，0.3 mol L-1 HNO3作为空白测量60秒，然后从随后的样品分析中减去。对Alfa标准溶液（相对于NIST SRM 3134）在29个月的时间内进行了7次测量，共76次分析，得出的结果为δ98/95Mo = -0.485±0.036‰（2sd）。

All molybdenum (Mo) isotope analyses were performed in low-resolution mode using a Nu Plasma II MC-ICP-MS coupled with an Aridus II (Teledyne CETAC Technologies, Omaha, NE, USA) at the Isotope Geology Laboratory, Institute of Geology, Chinese Academy of Geological Sciences. Samples were introduced at a flow rate of ~100 μL min⁻¹ using 0.3 mol L⁻¹ HNO3, with a typical Mo solution concentration of ~100 ng mL⁻¹. Instrumental mass bias was corrected via the double-spike method (Li et al., 2011). Isotope ratios of the 100Mo-97Mo double-spike and NIST SRM 3134 were calibrated using the Pd internal standard method, with 104Pd/102Pd = 10.922 (Siebert et al., 2001). A total of 100 measurement cycles were collected for each analysis, with an integration time of 3 s per cycle. Prior to analyzing each sample, a 60-second blank measurement was conducted using 0.3 mol L⁻¹ HNO3, and the blank signal was subsequently subtracted from the subsequent sample analysis data. The Alfa standard solution, calibrated relative to NIST SRM 3134, was measured 7 times over a 29-month period, totaling 76 analytical runs, yielding a result of δ98/95Mo = -0.485 ± 0.036‰ (2sd).

搜集汇总

背景与挑战

背景概述

该数据集提供了基于双稀释剂技术的高精度钼同位素分析方法数据，采用MC-ICP-MS仪器进行测量，并通过双稀释剂法校正仪器质量偏差，确保分析精度；数据以Excel格式存储，包含样品信息、分析物质类型和同位素组成，适用于固体地球科学和地球化学研究。