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Preparation and characterization of a new reference standard GSB-Mg for Mg isotopic analysis
Ist Teil von
Journal of analytical atomic spectrometry, 2020-06, Vol.35 (6), p.18-186
Ort / Verlag
London: Royal Society of Chemistry
Erscheinungsjahr
2020
Link zum Volltext
Quelle
Alma/SFX Local Collection
Beschreibungen/Notizen
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
δ
26
Mg 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
δ
26
Mg and
δ
25
Mg 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.
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.