A5067534807- Radioactive contamination and transfer
- Isotope Analysis in Ecology
- Geology and Paleoclimatology Research
- Radioactive element chemistry and processing
- Nuclear Physics and Applications
- Radioactivity and Radon Measurements
- Mass Spectrometry Techniques and Applications
- Geological and Geochemical Analysis
- Analytical chemistry methods development
- Groundwater and Isotope Geochemistry
- Paleontology and Stratigraphy of Fossils
- Atmospheric Ozone and Climate
- Ionosphere and magnetosphere dynamics
- Astro and Planetary Science
- earthquake and tectonic studies
- Geochemistry and Elemental Analysis
- Geomagnetism and Paleomagnetism Studies
- Atmospheric chemistry and aerosols
- Metabolomics and Mass Spectrometry Studies
- Laser-induced spectroscopy and plasma
- Atmospheric aerosols and clouds
- Geochemistry and Geologic Mapping
- Pleistocene-Era Hominins and Archaeology
- Ocean Acidification Effects and Responses
- Geological Studies and Exploration
Thermo Fisher Scientific (Germany)
2012-2022
Thermo Fisher Scientific (United States)
2012-2021
Thermo Fisher Scientific (Canada)
2015-2021
University of Saskatchewan
2013
University of Leicester
2007-2009
British Geological Survey
2007
Potassium isotopic compositions measured by MC-ICP-MS in cold-plasma, high-resolution mode indicate terrestrial variability <sup>41</sup>K/<sup>39</sup>K ratios.
This paper highlights the capabilities of a novel tribrid mass spectrometer for rapid, <italic>in situ</italic> geological age determinations typical crustal rocks and single, K-feldspars.
Abstract. In this paper, we present a HARMonized dataset of OZone profiles (HARMOZ) based on limb and occultation measurements from Envisat (GOMOS, MIPAS SCIAMACHY), Odin (OSIRIS, SMR) SCISAT (ACE-FTS) satellite instruments. These provide high-vertical-resolution ozone covering the altitude range upper troposphere up to mesosphere in years 2001–2012. HARMOZ has been created framework European Space Agency Climate Change Initiative project. The harmonized consists original retrieved each...
Rationale Li and Mg isotopes are increasingly used as a combined tool within the geosciences. However, established methods require separate sample purification protocols utilising several column separation procedures. This study presents single‐step cation‐exchange method for quantitative of trace levels from multiple matrices. Methods The utilises macro‐porous AGMP‐50 resin high‐aspect ratio column, allowing natural waters, sediments, rocks carbonate matrices following same elution...
The last decade has seen widespread adoption of triple quadrupole-based inductively coupled plasma–tandem mass spectrometry (ICPMS/MS) technique using a collision/reaction cell in combination with precell bandpass analyzer to measure isotopes otherwise masked by spectral interferences. High-precision isotope ratio analysis containing such would benefit from similar capability on multicollector plasma (MC-ICPMS) platform, but for MC-ICPMS/MS several limitations. To overcome these limitations,...
Double-Wien filter-selection-aperture and hexapole-collision-cell technologies coupled to laser ablation multicollector inductively plasma mass spectrometry (LA-MC-ICP-MS/MS) enables in situ analysis of 87 Sr variations produced by Rb decay.
Uranium isotope (235U, 236U, 238U) ratios were determined for microscopic uranium-oxide grains using laser-ablation multi-collector inductively-coupled-plasma mass-spectrometry (LA-MC-ICP-MS). The retrieved from contaminated soil and dust samples. analytical technique utilised is rapid, requires minimal sample preparation, well suited nuclear forensic applications. Precision accuracy assessed by replicate analyses of natural uraninite grains: relative uncertainty 235U/238U 0.2% (2σ), the...
Boron isotope ratios (δ11 B values) are used as a proxy for seawater paleo-pH, amongst several other applications. The analytical precision can be limited by the detection of low intensity ion beams from sample amounts. High-gain amplifiers offer improvements in signal/noise ratio and to increase measurement reduce amounts.1013 ohm amplifier technology has previously been applied radiogenic systems, but thus far not non-traditional stable isotopes. Here we apply 1013 boron using solution...
We revise the tantalum isotope composition and present a protocol to search for anomalies in geological extraterrestrial materials.
The boron isotope compositions (δ<sup>11</sup>B) of biogenic carbonates have proven to be an invaluable tool for investigating changes in ocean carbonate chemistry, especially the impacts declining seawater pH due rising levels atmospheric CO<sub>2</sub>.
The introduction of rapid response laser ablation cells and sample transport technologies to inductively coupled plasma mass spectrometry (LA-ICPMS) has enabled signal pulse durations for a single shot less than 10 ms. These developments have resulted in marked improvements analytical throughput, resolution, sensitivity vital the generation large, highly spatially resolved elemental maps. focus on mapping, particularly bioimaging, obscured possibility applying advantage other LA-ICPMS...
Abstract Uraniferous particles from contaminated environmental samples were analysed by scanning electron microscopy with energy dispersive X-ray analysis (SEM-EDXA) and microfocus extended absorption fine structure (mEXAFS) spectroscopy. The of interest are uranium oxides, which released into the environment combustion scrap depleted (DU) metal at a factory in Colonie, New York, USA. Most identified appear to have primary, ‘as emitted’ morphologies; some evidence minor dissolution,...
High precision measurements of isotope ratios are improved by continuous innovations in multi-collector ratio mass spectrometers. Recently, the Thermo Scientific TRITON Plus TIMS and NEPTUNE MC-ICP-MS benefitted from implementation Faraday cup current amplifiers with 1013 ohm feedback resistors. This significantly improves signal/noise ion beam reproducibility derived low intensities (fA range). On Plus, these follow development Jet Interface option, itself enabling significant increases for...
Rationale Magnesium is one of the most abundant elements in earth's crust and seawater. Fractionation its stable isotopes has been shown to be a useful indicator many geological, chemical, biological processes. For example, biogenic carbonates display an ~5‰ range δ 26 Mg values, which attributed variable degrees control on ions during biomineralisation. Understanding this essential for developing proxies based carbonates. Methods In work, we present new approach measuring using Laser...
&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; Within the first five years of initial introduction multicollector inductively coupled plasma mass spectrometry (MC-ICP-MS) with VG Elemental Plasma 54 potential for technique to be applied Isotope Cosmochemistry applications had already been recognized1. Early work focused on 182Hf-182W chronometer, which up until MC-ICP-MS, extremely difficult measure...
Abstract. In this paper, we present a HARMonized dataset of OZone profiles (HARMOZ) based on limb and occultation measurements from Envisat (GOMOS, MIPAS SCIAMACHY), Odin (OSIRIS, SMR) SCISAT (ACE-FTS) satellite instruments. These provide high-vertical-resolution ozone covering the altitude range upper troposphere up to mesosphere in years 2001–2012. HARMOZ has been created framework European Space Agency Climate Change Initiative project. The harmonized consists original retrieved each...