Geostandards and Geoanalytical Research
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Comprehensive Chemical and Isotopic Analyses of Basalt and Sediment Reference Materials
Geostandards and Geoanalytical Research - Tập 35 Số 1 - Trang 125-143 - 2011
Geochemical studies of geological samples require the precise determination of
their major and trace element contents and, when measured, of their isotopic
compositions. It is now commonly accepted that the accuracy and precision of
geochemical analyses are best estimated by the concomitant analysis of
international reference materials run as unknown samples. Although the
composition of a wide sel...
Determination of Lithium Contents in Silicates by Isotope Dilution ICP‐MS and its Evaluation by Isotope Dilution Thermal Ionisation Mass Spectrometry
Geostandards and Geoanalytical Research - Tập 28 Số 3 - Trang 371-382 - 2004
A precise and simple method for the determination of lithium concentrations in
small amounts of silicate sample was developed by applying isotope
dilution‐inductively coupled plasma‐mass spectrometry (ID‐ICP‐MS). Samples plus
a Li spike were digested with HF‐HClO4, dried and diluted with HNO3, and
measured by ICP‐MS. No matrix effects were observed for 7Li/6Li in rock
solutions with a dilution fac...
Determination of Reference Values for NIST SRM 610–617 Glasses Following ISO Guidelines
Geostandards and Geoanalytical Research - Tập 35 Số 4 - Trang 397-429 - 2011
We present new reference values for the NIST SRM 610–617 glasses following ISO
guidelines and the International Association of Geoanalysts’ protocol.
Uncertainties at the 95% confidence level (CL) have been determined for bulk‐
and micro‐analytical purposes. In contrast to former compilation procedures,
this approach delivers data that consider present‐day requirements of data
quality. New analyti...
A Proposal for the Publication of Geochemical Data in the Scientific Literature
Geostandards and Geoanalytical Research - Tập 36 Số 3 - Trang 225-230 - 2012
A proposal is set out for the information and details that should accompany the
publication of geochemical data in the research literature. This proposal is
based on the principle that sufficient detail must be included both to allow
independent replication of the results and for reviewers to confirm that data
are fit‐for‐purpose in supporting the way in which they have been interpreted.
In partic...
Production and Certification of a Unique Set of Isotope and Delta Reference Materials for Boron Isotope Determination in Geochemical, Environmental and Industrial Materials
Geostandards and Geoanalytical Research - Tập 36 Số 2 - Trang 161-175 - 2012
Isotopic reference materials are essential to enable reliable and comparable
isotope data. In the case of boron only a very limited number of such materials
is available, thus preventing adequate quality control of measurement results
and validation of analytical procedures. To address this situation a unique set
of two boron isotope reference materials (ERM‐AE102a and ‐AE104a) and three
offset δ1...
MC‐ICP‐MS Isotope Measurements with Direct Injection Nebulisation (d‐DIHEN): Optimisation and Application to Boron in Seawater and Carbonate Samples
Geostandards and Geoanalytical Research - Tập 35 Số 1 - Trang 75-88 - 2011
We report here an optimisation of the demountable direct injection high
efficiency nebuliser (d‐DIHEN) for isotopic measurements with a Neptune
(ThermoFisher Scientific, Bremen, Germany) multi‐collector inductively coupled
plasma‐mass spectrometer (MC‐ICP‐MS) and describe a method for boron isotopic
ratio determination. With direct injection nebulisation 100% of the analyte was
introduced into the...
Geostandards and Geoanalytical Research - Tập 37 Số 2 - Trang 111-154 - 2013
The NanoSIMS ion probe is a new‐generation SIMS instrument, characterised by
superior spatial resolution, high sensitivity and multi‐collection capability.
Isotope studies of certain elements can be conducted with 50–100 nm resolution,
making the NanoSIMS an indispensable tool in many research fields. We review
technical aspects of the NanoSIMS ion probe and present examples of applications
in cos...
Calcium Isotopic Fractionation and Compositions of Geochemical Reference Materials
Geostandards and Geoanalytical Research - Tập 41 Số 4 - Trang 675-688 - 2017
High‐precision calcium isotopic compositions of a set of geological reference
materials from the IAG (OU‐6), ANRT (UB‐N), MPI‐DING, USGS and GSJ, relative to
NIST SRM 915a, are reported here. Measurements were performed by thermal
ionisation mass spectrometry (Triton instrument) using a 42Ca–43Ca double spike.
δ44/40Ca values of selected reference materials, mainly felsic rocks, are
reported for t...
Zircon M257 ‐ a Homogeneous Natural Reference Material for the Ion Microprobe U‐Pb Analysis of Zircon
Geostandards and Geoanalytical Research - Tập 32 Số 3 - Trang 247-265 - 2008
We introduce and propose zircon M257 as a future reference material for the
determination of zircon U‐Pb ages by means of secondary ion mass spectrometry.
This light brownish, flawless, cut gemstone specimen from Sri Lanka weighed 5.14
g (25.7 carats). Zircon M257 has TIMS‐determined, mean isotopic ratios (2s
uncertainties) of 0.09100 ± 0.00003 for 206pb/238U and 0.7392 ± 0.0003 for
207pb/235U. It...
Further Characterisation of the 91500 Zircon Crystal
Geostandards and Geoanalytical Research - Tập 28 Số 1 - Trang 9-39 - 2004
This paper reports the results from a second characterisation of the 91500
zircon, including data from electron probe microanalysis, laser ablation
inductively coupled plasma‐mass spectrometry (LA‐ICP‐MS), secondary ion mass
spectrometry (SIMS) and laser fluorination analyses. The focus of this
initiative was to establish the suitability of this large single zircon crystal
for calibrating in situ ...
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