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Data DOI: 10.1594/IEDA/100696

Citation:
Barker, A., Muir, D., Majka, J., Troll, V. 2017. Precision and accuracy of glass analyses by electron microprobe (EMP) at Uppsala University, Version 1.0. Interdisciplinary Earth Data Alliance (IEDA). https://doi.org/10.1594/IEDA/100696. Accessed 2020-07-05.
Title:
Precision and accuracy of glass analyses by electron microprobe (EMP) at Uppsala University
Creator(s):
Barker, A.
Muir, D.
Majka, J.
Troll, V.
Abstract:
In situ analysis of glass requires matrix-matched standards for timely assessment of the accuracy and precision of the results. We provide data to constrain the precision and accuracy of glass analyses by FEG-EMP at Uppsala University. Seven of the DING glasses that represent a broad spectrum of compositions were used to test for accuracy and precision (Jochum et al., 2006). Multiple analyses were performed on each glass; ML3B (n=30), STHs 6/80 (n=43), ATHO (n=54), KL2 (n=30), GOR-132 (n=30), GOR-128 (n=38) and T1 (n=36). Glass analysis was performed using a field emission gun JEOL JXA-8530F Hyperprobe electron probe microanalyser at Uppsala University. The analytical conditions were 15 kV accelerating voltage and 4 nA probe current with a defocused beam of 5 to 10 micron diameter. Measurements were conducted with counting times of 10 s on peak and 5 s on lower and upper background and the PRZ correction method was applied to the data. Detection limits are typically ≤150 ppm. Despite different volatile contents, the DING glasses gave totals of 97.2±2.4 (2s.d.; n=241) and have been normalized to further assess the data quality. The precision of the analyses is reported as uncertainties at the 95% confidence level for major element oxides. When concentrations are >30 wt% the uncertainties are 0.7 to 1.6% (2s.d.), for concentrations of 5 to 30 wt% uncertainties are <7% (2s.d.) and at contents of 1 to 5 wt% uncertainties are <10% (2s.d.). Comparison to the preferred values reported by Jochum et al. (2006) reveals a correlation of 1.0079.
Keyword(s):
Coverage Scope: Other
Geographic Location: experimental glass
Related
Publication(s):
Jochum et al., (2006) MPI-DING reference glasses for in situ microanalysis: New reference values for element concentrations and isotopes ratios. Geochemistry, Geophysics, Geosystems Q02008, doi: 10.1029/2005GC001060
User Contributed Keyword(s):
glass analyses, FEG-EMP, precision, accuracy

Date Available:
2017-07-01
Date Created:
2017-06-23
Resource Type:
Dataset
File Format(s):
application/vnd.ms-excel
application/vnd.openxmlformats-officedocument.wordprocessingml.document
Data Curated by:
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File Name File Size
Microprobe_Glass_BARKERetal2017.xls379.5 KB
Barkeretal.glassEMP.docx113.64 KB

Format Type:   .zip .tar.gz
Version:
1.0
Language:
en
License:
Creative Commons Attribution-NonCommercial-Share Alike 3.0 United States [CC BY-NC-SA 3.0]

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