A5034219005- Analytical chemistry methods development
- Laser-induced spectroscopy and plasma
- Geological and Geochemical Analysis
- Mass Spectrometry Techniques and Applications
- Geochemistry and Geologic Mapping
- Geology and Paleoclimatology Research
- Cultural Heritage Materials Analysis
- Ion-surface interactions and analysis
- High-pressure geophysics and materials
- earthquake and tectonic studies
- Isotope Analysis in Ecology
- Mineralogy and Gemology Studies
- Electrochemical Analysis and Applications
- Archaeology and ancient environmental studies
- Astro and Planetary Science
- Mercury impact and mitigation studies
- Radioactive element chemistry and processing
- Nanoparticles: synthesis and applications
- Nuclear Physics and Applications
- Geochemistry and Elemental Analysis
- Heavy metals in environment
- Atmospheric chemistry and aerosols
- X-ray Spectroscopy and Fluorescence Analysis
- Analytical Chemistry and Sensors
- Pesticide Residue Analysis and Safety
ETH Zurich
2016-2025
University of Freiburg
2024
Board of the Swiss Federal Institutes of Technology
1999-2023
Klinik Preetz
2020
Charles Humbert 8
2013-2018
China University of Geosciences
2006-2017
University of Zurich
2010-2016
Otto-von-Guericke University Magdeburg
2015
École Polytechnique Fédérale de Lausanne
2003-2014
Medizinische Hochschule Hannover
2010-2013
We present new reference values for the NIST SRM 610–617 glasses following ISO guidelines and International Association of Geoanalysts’ protocol. Uncertainties at 95% confidence level (CL) have been determined bulk‐ micro‐analytical purposes. In contrast to former compilation procedures, this approach delivers data that consider present‐day requirements quality. New analytical nearly complete set GeoReM database were used study. Data quality was checked by application Horwitz function a...
Laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) produces complex, time-dependent signals. These require significantly different treatment both during data acquisition and reduction from the more steady-state signals produced by solution sample introduction. This paper discusses, in detail, considerations LA-ICP-MS analysis. Optimum parameters are suggested. Equations derived for calculation of concentrations LOD when time-resolved is employed, sensitivity calibration...
Various zircons of Proterozoic to Oligocene ages (1060‐31 Ma) were analysed by laser ablation‐inductively coupled plasma‐mass spectrometry. Calibration was performed using Harvard reference zircon 91500 or Australian National University TEMORA 1 as external calibrant. The results agree with those obtained SIMS within 2s error. Twenty‐four trace and rare earth elements (P, Ti, Cr, Y, Nb, fourteen REE, Hf, Ta, Pb, Th U) on four fragments 91500. NIST SRM 610 used the material 29 Si internal...
We present new analytical data of major and trace elements for the geological MPI‐DING glasses KL2‐G, ML3B‐G, StHs6/80‐G, GOR128‐G, GOR132‐G, BM90/21‐G, T1‐G, ATHO‐G. Different methods were used to obtain a large spectrum element data, in particular, EPMA, SIMS, LA‐ICPMS, isotope dilution by TIMS ICPMS. Altogether, more than 60 qualified geochemical laboratories worldwide contributed analyses, allowing us reference information values their uncertainties (at 95% confidence level) up 74...
In the anoxic Cariaco Basin of southern Caribbean, bulk titanium content undisturbed sediment reflects variations in riverine input and hydrological cycle over northern tropical South America. A seasonally resolved record shows that collapse Maya civilization Terminal Classic Period occurred during an extended regional dry period, punctuated by more intense multiyear droughts centered at approximately 810, 860, 910 A.D. These new data suggest a century-scale decline rainfall put general...
Quantitative studies on the uptake of nanoparticles into biological systems should consider simultaneous agglomera tion, sedimentation, and diffusion at physiologically relevant concentrations to assess corresponding risks nanomaterials human health. In this paper, transport industrially important cerium oxide nanoparticles, lung fibroblasts is measured in vitro after exposing thoroughly characterized particle suspensions a fibroblast cell culture for particles four separate size fractions...
Forty two major (Na, Mg, Ti and Mn) trace elements covering the mass range from Li to U in three USGS basalt glass reference materials BCR‐2G, BHVO‐2G BIR‐1G were determined using laser ablation‐inductively coupled plasma‐mass spectrometry. Calibration was performed NIST SRM 610 conjunction with internal standardisation Ca. Determinations also made on 612 614 as well unknown samples, included forty five (Al Na) elements. Relative standard deviation (RSD) of determinations below 10% for most...
Research Article| August 01, 1999 Metal fractionation between magmatic brine and vapor, determined by microanalysis of fluid inclusions C. A. Heinrich; Heinrich 1Eidgenössische Technische Hochschule, ETH Zürich, Isotope Geology Mineral Resources, Zentrum NO, 8092 Switzerland Search for other works this author on: GSW Google Scholar D. Günther; Günther Audétat; Audétat T. Ulrich; Ulrich R. Frischknecht Author Article Information Publisher: Geological Society America First Online: 02 Jun...
Recent developments in laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) have demonstrated its potential for situ microanalysis major, minor and trace elements solids, such as minerals. With the low backgrounds high sensitivity of new ICP-MS instruments, limits detection 1–10 ng g -1 a 40 µm pit many can be reached. Fractionation effects due to different rates various prevented quantification without matrix-matched standards with 1064 nm Nd:YAG lasers. These been...
Colloidal lead halide perovskite nanocrystals (NCs) have recently emerged as versatile photonic sources. Their processing and luminescent properties are challenged by the lability of their surfaces, i.e., interface NC core ligand shell. On example CsPbBr3 NCs, we model nanocrystal surface structure its effect on emergence trap states using density functional theory. We rationalize typical observation a degraded luminescence upon aging or recovery postsynthesis treatments. The conclusions...
Nearly one-third of the world's population, mostly women and children, suffer from iron malnutrition its consequences, such as anaemia or impaired mental development. Iron fortification food is difficult because soluble either unstable unpalatable, non-soluble not bioavailable. Genetic engineering crop plants to increase content has therefore emerged an alternative for biofortification. To date, strategies have relied on single genes, with limited success. Our work focuses rice a model...
The rapidly increasing production of engineered nanoparticles has raised questions regarding their environmental impact and mobility to overcome biological important barriers. Nanoparticles were found cross different mammalian barriers, which is summarized under the term translocation. present work investigates uptake translocation cerium dioxide into maize plants as one major agricultural crops. exposed either aerosol or suspension. Our study demonstrates that 50 μg cerium/g leaves was...
Research Article| August 01, 2013 Tracking the evolution of large-volume silicic magma reservoirs from assembly to supereruption Jörn-Frederik Wotzlaw; Wotzlaw * 1Section Earth and Environmental Sciences, University Geneva, 1205 Switzerland *E-mail: joern.wotzlaw@unige.ch. Search for other works by this author on: GSW Google Scholar Urs Schaltegger; Schaltegger Daniel A. Frick; Frick 2Laboratory Inorganic Chemistry, ETH Zurich, 8093 Michael Dungan; Dungan Switzerland3Department Geological...
This paper is a review of the basic principles and recent developments laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) as method for element- isotope-selective trace analysis solid materials. In course this review, aerosol formation/transportation process, quantification issues, well technical aspects concerning system configuration ICP operating conditions are outlined. Furthermore, performance femtosecond (fs) LA-based analyses one most important advancements made...