Preparation and characterization of a new reference standard GSB-Mg for Mg isotopic analysis
| Autor: | Zhian Bao, Juan Xu, Honglin Yuan, Pan Zhang, Shufeng Yang, Kangjun Huang, Li Deng |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Chemistry
Magnesium 010401 analytical chemistry Analytical chemistry chemistry.chemical_element Standard solution 010502 geochemistry & geophysics 01 natural sciences 0104 chemical sciences Analytical Chemistry Homogeneous Analytical procedures Reference standards Isotopes of magnesium Inductively coupled plasma mass spectrometry Spectroscopy 0105 earth and related environmental sciences Isotope analysis |
| Zdroj: | Journal of Analytical Atomic Spectrometry. 35:1080-1086 |
| ISSN: | 1364-5544 0267-9477 |
| Popis: | We have prepared a large volume of pure, concentrated and homogeneous magnesium standard solution (GSB-Mg) to be used as a secondary reference standard by the magnesium isotope community. This new standard solution can also be used for quality assurance, including the development and validation of analytical procedures, preparation and test of analytical methods, quality control and training of analysts. The δ26Mg values relative to DSM3, measured by multiple-collector inductively coupled plasma mass spectrometry (MC-ICP-MS), are −2.038 ± 0.027‰ (n = 45, Lab 1), −2.024 ± 0.055‰ (n = 7, Lab 2), −2.078 ± 0.081‰ (n = 6, Lab 3), −2.037 ± 0.015‰ (n = 8, Lab 4), and −2.067 ± 0.039‰ (n = 12, Lab 5). The δ26Mg and δ25Mg values for the GSB-Mg standard solution are −2.049‰ and −1.056‰, with a combined expanded (k = 2) uncertainty of 0.049‰ and 0.028‰, respectively. These values show higher similarity to Mg isotopic compositions of carbonates and marine sediments compared to those of the mantle and crustal rocks, making the GSB-Mg solution a great reference material for Mg isotopic analysis of carbonates and marine sediments. |
| Databáze: | OpenAIRE |
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